File Attachment 1: PICAXE_08M2_x_EPSON_SG8002DC_WSPR_FSK_CW_OOK_CW.png
Re: Hifer LCSC
USC is located in Spartanburg, SC EM94bw approximately 13.555290 MHz
LCSC is located on Edisto Island, SC EM92ul approximately 13.555620 MHz
Both are in operation now but LCSC has a suspect RF connector that will be replaced in a few weeks
Antenna are dipoles at 40-50 feet. USC may move to a vertical 1/4 wave antenna at my office location 5 miles away.
Both transmitters use a PIC 12F509 and an Epson SG 8002 SMT programmable oscillator of my design.
Re: SAQ Reports “an Incredible Number” of Listeners for July 4 Transmissio
Posted by Mike Terry on September 01, 2021 at 09:26:27.
In reply to SAQ Reports “an Incredible Number” of Listeners for July 4 Transmissio posted by Mike Terry on August 20, 2021
https://alexander.n.se/wp-content/uploads/2021/08/Alexanderson-Day-2021-Summary-Report-20210812.pdf
WA1EDJ and K3SIW WSPR heard in Hawaii
Posted by Bill WB8ELK on September 02, 2021 at 03:47:30.
I tuned into the AI6VN/KH6 KiwiSDR remote receiver tonight and was able to get some good copy on WA1EDJ and K3SIW WSPR from Hawaii - Bill WB8ELK
09/02/21 UTC: Siw/EDJ In Maui
0338 -26 -3.5 13.555389 0 WA1EDJ EM83 7 7336
0340 -24 -2.9 13.555401 0 K3SIW EN52 7 6714
Posted by Zeak on September 02, 2021 at 05:05:30.
Good that you folks are looking at Maui.
Some nights when the solar flux is at >85, I see SIW and EDJ on http://jp1odj.proxy.kiwisdr.com:8073/, not much of a signal, but still there, never the less.
EDJ Window On The Left Coast
Posted by Zeak on September 02, 2021 at 05:15:01.
It's getting to be a regular thing at about the same time and good signal too!!
UTC dB dT Freq df Call Gr km dBm
0154 -20 -1.2 13.555364 0 WA1EDJ EM83 3152 7
0202 -15 -1.2 13.555371 0 WA1EDJ EM83 3152 7
0206 -22 -1.2 13.555370 1 WA1EDJ EM83 3152 7
0214 -25 -1.2 13.555372 2 WA1EDJ EM83 3152 7
0218 -21 -1.2 13.555372 1 WA1EDJ EM83 3152 7
0226 -23 -1.2 13.555371 0 WA1EDJ EM83 3152 7
0230 -25 -1.2 13.555371 0 WA1EDJ EM83 3152 7
Zeak
Receiver KiwiSDR
Ant: 80m dipole at 15m
location: DM12
Re: WA1EDJ and K3SIW WSPR heard in Hawaii
Posted by WA1EDJ Bob on September 02, 2021 at 13:14:54.
In reply to WA1EDJ and K3SIW WSPR heard in Hawaii posted by Bill WB8ELK on September 02, 2021
Thanks Bill! That's quite a haul.
Bob Re: EDJ Window On The Left Coast
EDJ
Posted by WA1EDJ Bob on September 02, 2021 at 13:19:25.
In reply to EDJ Window On The Left Coast posted by Zeak on September 02, 2021
Thanks Zeak! I seem to be doing really well to the west these days.
Just using a 1/4W vert 10' off the ground with trees surrounding it.
I have some radials hanging off of it but not spread nicely at all,
and 100+ feet of 58U type coax to the indoor TX.
Bob
EDJ
Re: WA1EDJ and K3SIW WSPR heard in Hawaii
Posted by Mark Garrett on September 03, 2021 at 02:54:12.
In reply to Re: WA1EDJ and K3SIW WSPR heard in Hawaii posted by WA1EDJ Bob on September 02, 2021
Bob:
Just curious of what you are running for an antenna. I am running a ground mounted 1/4 wave with 8 radials (and will be adding more).
Mark evening wspr2 hifer
SZX
Posted by swlem3 on September 03, 2021 at 03:01:20.
Noticed decent wspr2 hifer propagation this evening Sept 2-3 UTC 2021.
2250 -24 -0.5 13.555333 0 VA3ROM EN58 7 1877 2300 -27 -0.8 13.555331 0 VA3ROM EN58 7 1877 0010 -24 -0.7 13.555333 0 VA3ROM EN58 7 1877 0100 -25 -0.1 13.555393 0 K3SIW EN52 7 1330 0110 -20 -0.2 13.555394 0 K3SIW EN52 7 1330 0120 -20 -0.2 13.555390 0 K3SIW EN52 7 1330 0130 -20 -0.3 13.555391 0 K3SIW EN52 7 1330 0140 -26 -0.2 13.555391 0 K3SIW EN52 7 1330 0146 -25 -1.0 13.555379 0 WA1EDJ EM83 7 1449 0150 -19 -1.0 13.555378 0 WA1EDJ EM83 7 1449 0150 -26 -0.2 13.555391 -1 K3SIW EN52 7 1330 0154 -19 -1.1 13.555377 0 WA1EDJ EM83 7 1449 0158 -24 -1.2 13.555377 2 WA1EDJ EM83 7 1449 0200 -22 -0.4 13.555391 0 K3SIW EN52 7 1330 0202 -27 -1.0 13.555379 1 WA1EDJ EM83 7 1449 0206 -25 -1.1 13.555378 0 WA1EDJ EM83 7 1449 0210 -22 -1.2 13.555378 0 WA1EDJ EM83 7 1449 0210 -22 -0.5 13.555391 0 K3SIW EN52 7 1330 0214 -18 -1.2 13.555378 1 WA1EDJ EM83 7 1449 0218 -20 -1.2 13.555379 1 WA1EDJ EM83 7 1449 0220 -21 -0.5 13.555391 0 K3SIW EN52 7 1330 0222 -23 -1.2 13.555379 1 WA1EDJ EM83 7 1449 0226 -21 -1.3 13.555380 0 WA1EDJ EM83 7 1449
Ray ... elad FDM-S2 w/ random wire vertical
Re: WA1EDJ and K3SIW WSPR heard in Hawaii
Posted by WA1EDJ Bob on September 03, 2021 at 13:08:55.
In reply to Re: WA1EDJ and K3SIW WSPR heard in Hawaii posted by Mark Garrett on September 03, 2021
Mark,
Actually my antenna sounds much like yours. 1/4 wave, mounted about 10' off ground on a 4x4, I think 4 radials, not hanging symmetrically off the base. I never was able to tune it to better than about 1.7:1 swr. It has some pines around it too.
It is actually an extendable aluminum paint/cleaning pole from HD.
I bonded the sections together to be conductive.
I've not seen you WSPRing for a while now though you do get reports from others.
I pretty regularly copy ROM and SIW so I'd think I would see you. N/S is generally a good path for me.
One never knows with propagation. That why we do this.....
I'll keep an eye out. May just be when I listen. I am TX WSPR till 1800 local since I'm not home to listen. I may just be missing you. Will try more RX this long weekend!
Bob Reminder: Lowfer net +/- 3927 kHz Saturday morning 0800 California time
EDJ
EM83du
Posted by Jerry Parker on September 03, 2021 at 13:57:11.
Reminder: Lowfer net +/- 3927Khz Saturday morning 0800 California time
Or listen online at kfs:
http://69.27.184.62:8901/?tune=3927lsb
or
KPH Point Reyes:
http://198.40.45.23:8073/
or
Utah Web sdr:
http://www.sdrutah.org/websdr1.html
If you cannot get into the net on 80 meters you can listen on KFS and participate by sending net control your thoughts to wa6owr@gmail.com
73
EH seen via Iceland SDR
Jerry
Posted by Bill WB8ELK on September 03, 2021 at 17:30:28.
Just hopping around web SDR radios today and thought I would check one on Iceland. I can clearly see EH coming in there but no one else. - Bill WB8ELK
136.450 kHz beacon 2200 meters update
Posted by Lee on September 03, 2021 at 19:22:12.
Hi folks. My beacon on 136.450 khz will be delayed this year because of solar construction on my roof. The new roof is complete but the solar portion of the project is being slowed by city permit issues. The antenna is up but not deployed because of safety issues on the roof. I hope to have this resolved before the end of September. Thanxs Lee KE6PCT
Re: EH seen via Iceland SDR
Posted by Garry, K3SIW on September 04, 2021 at 02:21:33.
In reply to EH seen via Iceland SDR posted by Bill WB8ELK on September 03, 2021
Thanks for the wakeup call Bill on using kiwiSDRs (see map.kiwisdr.com) to monitor hifers. I've used them awhile to check to see if DX NDBs were really active or not, but never thought about using them at HF. Actually, most of the setups have antennas geared toward HF rather than LF so they generally do well. All that's needed is a virtual audio cable to connect your browser to programs like wspr-x for decoding and spectrum lab for waterfall monitoring.
Earlier today I looked at a number of such SDRs beginning with local W9XA to see my pair of hifers from just 10 miles. I then moved farther afield choosing SDRs that had high S/N scores in UT, CO, and TX. Saw signals from NC, EH, ROM, 7P, and WM, and got wspr decodes from KA9SZX, WA1EDJ, and K3SIW. With a little more time and detective work all the active 22mtr stations listed at https://www.lwca.net/sitepage/part15/index.htm probably would show up on one or more of the SDRs.
73, Garry, K3SIW, EN52ta, Elgin, IL
Re: evening wspr2 hifer
Posted by swlem3 on September 04, 2021 at 02:46:29.
In reply to evening wspr2 hifer posted by swlem3 on September 03, 2021
Had a strong showing of wspr2 stations today. Seems EDJ had the most decodes, but SIW and ROM are also represented. Sept 3, 2021
1454 -24 -1.1 13.555385 2 WA1EDJ EM83 7 1449 1458 -23 -1.1 13.555383 0 WA1EDJ EM83 7 1449 1500 -19 -0.7 13.555396 0 K3SIW EN52 7 1330 1502 -24 -1.0 13.555383 2 WA1EDJ EM83 7 1449 1506 -22 -1.1 13.555383 0 WA1EDJ EM83 7 1449 1510 -26 -1.0 13.555384 2 WA1EDJ EM83 7 1449 1514 -27 -1.1 13.555384 0 WA1EDJ EM83 7 1449 1522 -30 -1.0 13.555385 0 WA1EDJ EM83 7 1449 1530 -28 -0.1 13.555396 -1 K3SIW EN52 7 1330 1558 -21 -1.1 13.555384 0 WA1EDJ EM83 7 1449 1600 -25 -0.3 13.555396 0 K3SIW EN52 7 1330 1602 -26 -1.0 13.555384 1 WA1EDJ EM83 7 1449 1610 -24 -0.1 13.555398 0 K3SIW EN52 7 1330 1730 -27 -1.0 13.555389 0 WA1EDJ EM83 7 1449 1738 -27 -1.2 13.555389 1 WA1EDJ EM83 7 1449 1742 -30 -1.1 13.555389 0 WA1EDJ EM83 7 1449 1750 -29 -1.0 13.555388 2 WA1EDJ EM83 7 1449 1814 -26 -1.0 13.555389 0 WA1EDJ EM83 7 1449 1818 -25 -1.0 13.555390 2 WA1EDJ EM83 7 1449 1820 -28 -0.4 13.555340 0 VA3ROM EN58 7 1877 1826 -28 -1.0 13.555389 0 WA1EDJ EM83 7 1449 1830 -27 -1.0 13.555388 -1 WA1EDJ EM83 7 1449 1838 -28 -1.0 13.555388 0 WA1EDJ EM83 7 1449 2058 -27 -0.9 13.555395 1 WA1EDJ EM83 7 1449 2120 -26 -0.5 13.555344 0 VA3ROM EN58 7 1877 2126 -28 -1.0 13.555395 2 WA1EDJ EM83 7 1449 2130 -27 -0.9 13.555345 0 VA3ROM EN58 7 1877 2134 -28 -1.0 13.555396 2 WA1EDJ EM83 7 1449 2150 -29 -1.1 13.555397 1 WA1EDJ EM83 7 1449 2320 -24 -0.8 13.555346 0 VA3ROM EN58 7 1877 0030 -23 0.1 13.555407 0 K3SIW EN52 7 1330 0040 -28 -0.8 13.555346 0 VA3ROM EN58 7 1877 0040 -22 -0.1 13.555408 0 K3SIW EN52 7 1330 0050 -20 -0.2 13.555404 -1 K3SIW EN52 7 1330 0100 -16 -0.1 13.555402 0 K3SIW EN52 7 1330 0110 -20 -0.1 13.555402 -1 K3SIW EN52 7 1330 0120 -20 -0.1 13.555401 0 K3SIW EN52 7 1330 0130 -21 -0.2 13.555402 0 K3SIW EN52 7 1330 0140 -23 -0.3 13.555401 0 K3SIW EN52 7 1330 0150 -23 -1.1 13.555388 -1 WA1EDJ EM83 7 1449 0150 -19 -0.2 13.555400 0 K3SIW EN52 7 1330 0154 -23 -1.2 13.555387 1 WA1EDJ EM83 7 1449 0158 -22 -1.1 13.555387 0 WA1EDJ EM83 7 1449 0200 -25 -0.3 13.555401 0 K3SIW EN52 7 1330 0202 -22 -1.1 13.555389 1 WA1EDJ EM83 7 1449 0206 -22 -1.1 13.555389 1 WA1EDJ EM83 7 1449 0210 -17 -1.2 13.555389 0 WA1EDJ EM83 7 1449 0210 -26 -0.3 13.555401 0 K3SIW EN52 7 1330 0214 -22 -1.2 13.555388 1 WA1EDJ EM83 7 1449 0218 -20 -1.2 13.555388 1 WA1EDJ EM83 7 1449 0222 -26 -1.0 13.555387 1 WA1EDJ EM83 7 1449
Ray
Re: EH seen via Iceland SDR
Posted by Bill WB8ELK on September 04, 2021 at 17:12:47.
In reply to Re: EH seen via Iceland SDR posted by Garry, K3SIW on September 04, 2021
Hi Garry,
Yes...these remote SDR radios are a great way to observe HiFers from different locations. I have a virtual audio cable program running in order to use both WSJT-X and Argo. Also when hopping around these remote receivers usually list their grid square and I go into settings on my WSJT-X program and change my grid square to match the remote receiver's location so that it displays properly on the WSPRnet.org map. I use rx.linkfanel.net to find these receivers. - Bill WB8ELK
Re: evening wspr2 hifer
Posted by swlem3 on September 05, 2021 at 02:27:18.
In reply to evening wspr2 hifer posted by swlem3 on September 03, 2021
Nice to see hifer wspr2 propagation doing better the past few days. You can observe the prop shifting around during the day by observing which calls get decoded. Since I'm currently in the mood to let my equipment run all day doing this, I figure why not post the results so others can check propagation patterns. Will probably do something else radio-wise in a few days, and give the board a break by not posting... hi.
2028 -22 1.3 13.555396 0 KA9SZX EN40 7 1054 2040 -25 -0.5 13.555390 0 K3SIW EN52 7 1330 2050 -22 -0.4 13.555393 0 K3SIW EN52 7 1330 2130 -29 -0.4 13.555394 0 K3SIW EN52 7 1330 2140 -29 -0.5 13.555394 -1 K3SIW EN52 7 1330 2200 -26 -0.4 13.555394 0 K3SIW EN52 7 1330 2210 -29 -0.5 13.555394 0 K3SIW EN52 7 1330 2318 -30 -1.4 13.555380 1 WA1EDJ EM83 7 1449 2326 -26 -1.4 13.555383 1 WA1EDJ EM83 7 1449 2330 -28 -1.5 13.555383 1 WA1EDJ EM83 7 1449 2346 -30 -1.5 13.555382 0 WA1EDJ EM83 7 1449 2358 -28 -1.4 13.555383 0 WA1EDJ EM83 7 1449 0002 -28 -1.5 13.555383 0 WA1EDJ EM83 7 1449 0010 -27 -1.4 13.555381 0 WA1EDJ EM83 7 1449 0014 -24 -1.6 13.555382 0 WA1EDJ EM83 7 1449 0100 -26 -1.6 13.555334 0 VA3ROM EN58 7 1877 0110 -24 -0.8 13.555333 0 VA3ROM EN58 7 1877 0110 -30 -0.3 13.555393 0 K3SIW EN52 7 1330 0240 -28 -0.9 13.555333 0 VA3ROM EN58 7 1877 0310 -26 -1.3 13.555334 1 VA3ROM EN58 7 1877 0330 -25 -1.3 13.555333 0 VA3ROM EN58 7 1877 0340 -26 -0.9 13.555332 0 VA3ROM EN58 7 1877 0430 -20 -1.7 13.555333 0 VA3ROM EN58 7 1877 0510 -18 -1.6 13.555382 1 WA1EDJ EM83 7 1449 0514 -23 -1.4 13.555382 0 WA1EDJ EM83 7 1449 0518 -19 -1.6 13.555381 0 WA1EDJ EM83 7 1449 0522 -19 -1.5 13.555381 1 WA1EDJ EM83 7 1449 0526 -19 -1.6 13.555381 2 WA1EDJ EM83 7 1449 0530 -24 -1.6 13.555333 0 VA3ROM EN58 7 1877 0530 -20 -1.6 13.555382 0 WA1EDJ EM83 7 1449 0534 -17 -1.6 13.555382 0 WA1EDJ EM83 7 1449 0538 -22 -1.6 13.555380 0 WA1EDJ EM83 7 1449 0542 -20 -1.6 13.555379 1 WA1EDJ EM83 7 1449 0546 -22 -1.6 13.555380 1 WA1EDJ EM83 7 1449 0550 -17 -1.6 13.555382 1 WA1EDJ EM83 7 1449 0554 -20 -1.6 13.555383 0 WA1EDJ EM83 7 1449 0558 -22 -1.6 13.555382 0 WA1EDJ EM83 7 1449 0100 -18 -0.6 13.555392 0 K3SIW EN52 7 1330 0102 -21 -1.1 13.555380 1 WA1EDJ EM83 7 1449 0106 -18 -1.0 13.555381 0 WA1EDJ EM83 7 1449 0110 -19 -1.0 13.555382 1 WA1EDJ EM83 7 1449 0110 -20 -0.1 13.555394 0 K3SIW EN52 7 1330 0114 -16 -1.1 13.555383 0 WA1EDJ EM83 7 1449 0118 -22 -1.1 13.555382 0 WA1EDJ EM83 7 1449 0120 -19 -0.1 13.555394 0 K3SIW EN52 7 1330 0122 -25 -1.0 13.555380 0 WA1EDJ EM83 7 1449 0126 -20 -1.0 13.555379 2 WA1EDJ EM83 7 1449 0130 -20 -1.1 13.555382 2 WA1EDJ EM83 7 1449 0130 -21 -0.1 13.555394 0 K3SIW EN52 7 1330 0134 -24 -1.1 13.555382 1 WA1EDJ EM83 7 1449 0138 -25 -1.1 13.555382 0 WA1EDJ EM83 7 1449 0140 -20 -0.1 13.555395 0 K3SIW EN52 7 1330 0142 -20 -1.1 13.555382 0 WA1EDJ EM83 7 1449 0146 -22 -1.1 13.555381 0 WA1EDJ EM83 7 1449 0150 -15 -0.1 13.555394 0 K3SIW EN52 7 1330 0154 -25 -1.0 13.555380 0 WA1EDJ EM83 7 1449 0200 -28 -0.1 13.555395 0 K3SIW EN52 7 1330 0206 -18 -1.1 13.555381 0 WA1EDJ EM83 7 1449
Ray
Freq shifting an oscillator w/chip select
Posted by John K5MO on September 05, 2021 at 13:06:38.
Hello Friends. I seem to recall someone posting about using a varactor diode or a varying voltage (I can't remember which) on a chip enable pin of a particular oscillator to produce some frequency shifted output. Sadly, I can't find it now.
Can the original poster send it again please or provide a pointer to the posting? Thanks!
Re: Freq shifting an oscillator w/chip select
Posted by John Davis on September 05, 2021 at 14:53:22.
In reply to Freq shifting an oscillator w/chip select posted by John K5MO on September 05, 2021
That thread started here:
lwca.net/mb/msg/10808.htm
Re: Freq shifting an oscillator w/chip select
Posted by John Davis on September 05, 2021 at 17:55:43.
In reply to Re: Freq shifting an oscillator w/chip select posted by John Davis on September 05, 2021
John, I may have misstated the previous link as being the first mention of frequency shift with the SG8002. It was the first to reveal the schematic. Robert teased us before that, beginning in this thread:
lwca.net/mb/msg/10786.htm
Also see this thread: lwca.net/mb/msg/11140.htm
...and particularly these two posts, for more on the chip's use as an FSK modulator: Re: Freq shifting an oscillator w/chip select
lwca.net/mb/msg/11151.htm
lwca.net/mb/msg/11158.htm
Posted by john k5mo on September 05, 2021 at 18:26:33.
In reply to Re: Freq shifting an oscillator w/chip select posted by John Davis on September 05, 2021
Thanks for the info John. I'm going to snag this info this time. Did you ever determine the Analog V swing needed to provide the needed deviation? I might give this a try with an ATTiny85
Again, thanks Re: Freq shifting an oscillator w/chip select
John B
Posted by Robert, VA3ROM on September 05, 2021 at 19:09:05.
In reply to Re: Freq shifting an oscillator w/chip select posted by john k5mo on September 05, 2021
Hi John,
Just sent you a reply to your direct email to me. In case anyone else is wondering.
Here's the schematic of how a PICAXE is used to control a Epson SG8002DC to do generate FS2-K CW and 4-FSK WSPR.
It should be easy enough to use with most other MCUs. The secret is to use DAC voltage outputs for 2-FSK CW and 4-FSK WSPR. Then I discovered that I could also do OOK CW with a quick resistor removal.
The BJT circuits are all from internet circuits and not original. I just found a different way or using a copy quite by accident when I touched the enable pin to ground and measured the freuqency output the SG8002DC and then to 5 VDC. You seen an immediate FSK shift of about 4 Hz.
As you go up in frequency the SG8002DC is easier to FSK and my 28 MHz version can easily do 10 Hz shifts and doesn't require as much DAC voltage drive, either.
The specific Epson SG8002DC is from Digikey and there are many variants so you need to be specific!
SGR-8002DC-SHB-ND CMOS PROG 5V ST
I haven't tried the 3 volt or TTL variants. The key think is that some SG8002 variants don't have enable enabled but the one I use does.
73,
Robert
---------------------------------------------------------------
File Attachment 1: PICAXE_08M2_x_EPSON_SG8002DC_WSPR_FSK_CW_OOK_CW.png
Re: Freq shifting an oscillator w/chip select
FYI I wanted more than a beacon and added telemetry using the DS3231 RTC for it's digital thermometer (for ambient air temp) and analog voltage divider to monitor my RV trailer batter voltage (it powers the propane fridge, CO detector, solar charger and the 22m FSK CW and WSPR beacon located in my trailer feeding an inverted V-dipole with the apex at 3 m and ends about 1 m off ground. My thing is collecting data for remote site monitoring. The 22m band allows for unattended (no control operator) telemetry beacons.
73
Robert
WM Lowfer on air
Posted by Mike N8OOU on September 05, 2021 at 23:10:31.
The WM Lowfer antenna support lines have been repaired, and the beacon is running. No changes to the beacon, 185300 + a smidgon Hz, qrss 30 and 60 plus the graphic for id. Reports are welcomed.
Mike 73
Re: WM Lowfer on air
Posted by Mike N8OOU on September 05, 2021 at 23:14:03.
In reply to WM Lowfer on air posted by Mike N8OOU on September 05, 2021
And of course, I did it again, I should have said FSKcw at qrss30 and 60 timings.
Mike
Re: WM Lowfer on air
Posted by Garry, K3SIW on September 06, 2021 at 11:45:51.
In reply to WM Lowfer on air posted by Mike N8OOU on September 05, 2021
Mike, lowfer WM is coming through fine this morning. Will put a screen capture on https://mailman.qth.net/pipermail/lowfer/2021-September/date.html shortly.
73, Garry, K3SIW, EN52ta, Elgin, IL
Re: Freq shifting an oscillator w/chip select
Posted by Pat Bunn on September 06, 2021 at 16:00:07.
In reply to Re: Freq shifting an oscillator w/chip select posted by john k5mo on September 05, 2021
USC has used SG 8002 for years generating FSK. I used a PIC 12F509 and the 5 Volt TTL version of the SG 8002. I have used the CA and CE SMT chip and the DIP version. All seem to work petty much the same.
The PIC switched a 2N7002 FET to change the LM317L voltage regulator to change the VCC pin on the SG 8002 about .4-.5 volts.
I have tried to attached a photo of the transmitter on an older version using the DIP SG 8002. Doesn't look possible on this board
One LCSC I am using the SMT SA SMT version of the GS 8002. Output power changes slightly at the lower voltage and you can use a Schmitt trigger buffer after the SB 8002 if you wish. The latest version of this transmitter has one on board. USC Transmitter Board Photo
Posted by Pat Bunn on September 06, 2021 at 16:27:55.
USC Transmitter Photo Link
Re: Freq shifting an oscillator w/chip select
https://thumbnails-photos.amazon.com/v1/thumbnail/bajUR-R8SsmYf2F_09bFTg?viewBox=644%2C479&ownerId=A2ZZIDQ7NUTG3F
Posted by WA1EDJ Bob on September 06, 2021 at 18:27:35.
In reply to Re: Freq shifting an oscillator w/chip select posted by Pat Bunn on September 06, 2021
Pat did develop the SG 8002 FSK method many years ago. He gave me the original DIP version PCB quite a while ago. I built it up and still use it when I'm back on QRSS FSK.
The new SMD version is a nicer design.
BTW Pat, you have to be an authenticated author to post attachements. Ask John to add you to the list. I think there is a page here to apply.
I've not seen USC lately or LCSC at all. We are probably too close for most conditions.
Bob Re: USC Transmitter Board Photo
EDJ
Posted by Pat Bunn on September 06, 2021 at 18:40:22.
In reply to USC Transmitter Board Photo posted by Pat Bunn on September 06, 2021
Try Again on the link
Re: Freq shifting an oscillator w/chip select
https://hosting.photobucket.com/images/i/pbunn9801/rotated.jpg?width=1920&height=1080&fit=bounds
Posted by Pat Bunn on September 06, 2021 at 18:44:51.
In reply to Re: Freq shifting an oscillator w/chip select posted by WA1EDJ Bob on September 06, 2021
Conditions have been pretty bad Bob. I can up the power a bit, but before I got complaints that I was running too much power at 13 DBm so I lowered it to 7 DBm.
Haven't seen it on the grabbers since. LCSC may have a cable connector problem also. It will be a couple of week until I get back down there.
Pat
Re: What's this ... hifer band
Posted by John Davis on September 06, 2021 at 20:22:57.
In reply to What's this ... hifer band posted by swlem3 on August 31, 2021
Turns out it IS a HiFER, Ray; one we've both been looking for, but not in the expected place and with a bit of a modulation problem. Today was my first listening opportunity since you posted the question I saw the signal right away, but it took until late in the noon hour to get enough uninterrupted, clear copy to figure out what was going on. Here's a sample, with EH, NC, and part of 7P also showing. I'm wanting to be able to "show my work" graphically before I reveal the solution in a few minutes1
---------------------------------------------------------------
File Attachment 1: 6sepb04.jpg
Re: Freq shifting an oscillator w/chip select
You're getting into north Texas and southeast Kansas at +7 dBm just fine, Pat, so far as signal strength goes. There is a different matter that you might want to look into, though. See my next post in a few...
Re: Freq shifting an oscillator w/ Pin 5 :-)
Posted by John K5MO on September 06, 2021 at 21:22:10.
In reply to Re: Freq shifting an oscillator w/chip select posted by Pat Bunn on September 06, 2021
Hi Pat, Bob, John,
I spent some time at the bench playing with one of the SG chips (with a Enable high function). I can hear the frequency shift with Vcc changes pretty clearly. I did not have much luck "modulating" the output frequency with Pin 5 (the Output control pin) alone. I'll give a try on the bench with Argo running to measure the shift.
As you note, the amplitude of the output decreases a bit with Vcc, but not much in the region of interest (that which changes the output frequency slightly).
Re: What's this? ... USC !
Posted by John Davis on September 06, 2021 at 21:56:01.
In reply to Re: What's this ... hifer band posted by John Davis on September 06, 2021
From Ray's capture, I suspected it might indeed by a HiFER. It looked to the eye as if the intended modulation might be slow FSK, but that something was causing unwanted differention of the rectangular waveform.
When I finally had multiple solid copies of the signal, I became sure of that supposition, and eventually "saw" the ID mentally, but I wanted to work it out graphically to be sure.
To do that, I took the best trace I had and magnified it in MS Paint. Assuming that the upward/positive-going spikes indicated the leading edge of the Mark condition, I denoted each of those with a green vertical line ("go").
To indicate return to Space condition, I placed red--actually, pink--lines centered as closely as possible on the downward/negative going spikes ("stop").
Connecting each green to its accompanying red with a nice, fat, yellow line gives us the Big Reveal!
---------------------------------------------------------------
File Attachment 1: 6sepa04a.jpg
File Attachment 2: 6sepa04b.jpg
File Attachment 3: 6sepa04x.jpg
Re: What's this? ... USC !
Wow, what detective work! I've seen this too but had no clue.
So I have been seeing USC, just did not know it.
Bob
EDJ
Re: What's this? ... USC !
Posted by Pat Bunn on September 06, 2021 at 22:18:58.
In reply to Re: What's this? ... USC ! posted by John Davis on September 06, 2021
John
I suspect that it is LCSC. It was left operating outside with a suspected bad RF connector and may be subject to dampness. USC has been shut down most all day while am testing signal levels at approximately1 13.555310 with various rectangular waveforms at different power level.
LCSC looks like there may be a bad switching transistor or something slowing down the voltage change - maybe even a bad oscillator - but I have never seen one so far.
It was marked as 13.5555 on the chip but these chips are 100ppm rated. I have not been able to monitor it at all since it was installed.
USC will return to normal shortly. The chip is marked 13.5553. I output measures 13.555218 MHz
LCSC will have a completely new transmitter installed in a die cast waterproof boc in a few weeks when I get back to Edisto Island in a few weeks. I'll post a photo of the entire beacon setup in a week or so. it will be much better that the taped up plastic bag that encloses it now.
Pat Re: Freq shifting an oscillator w/ Pin 5 :-)
N4LTA
Pat
Posted by John Davis on September 06, 2021 at 22:23:20.
In reply to Re: Freq shifting an oscillator w/ Pin 5 :-) posted by John K5MO on September 06, 2021
Whatever you were modulating during the noon hour CDT was giving a whopping 15 Hz deviation, John, assuming that was you centered around 13555.280 at that time (see attachment). Not sure what SG8002 part number you're using, but I'm not familiar with one that uses Pin 5 for output enable or inverted-standby?
---------------------------------------------------------------
File Attachment 1: 6sepb01.jpg
Re: What's this? ... USC !
Not USC - LCSC I think USC is off the air most of the day - Just went back in service at approximately 13.555220 Mhz
Pat
Re: What's this? ... USC !
Posted by John Davis on September 06, 2021 at 22:28:04.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 06, 2021
Are you sure LCSC has the intended PIC on board? There's no way to read the output of the mystery signal as anything but "USC" as it stands.
Re: Freq shifting an oscillator w/ Pin ONE
Posted by John K5MO on September 06, 2021 at 22:47:08.
In reply to Re: Freq shifting an oscillator w/ Pin 5 :-) posted by John Davis on September 06, 2021
Wasn't me , John, I was messing with a 40M version on the bench into a resistor dummy load.
I think whoever you copied was in your neighborhood though. Those are some strong signals!
Re: What's this? ... USC !
Posted by Pat Bunn on September 06, 2021 at 22:49:33.
In reply to Re: What's this? ... USC ! posted by John Davis on September 06, 2021
USC was off the air most of the afternoon. It is back on now but my frequency meter reads it as 13.555186 in the last 15 seconds with a very good frequency meter.
Possibly the PIC chip is the incorrect one is LCSC
Do you see USC now?
Re: What's this? ... USC !
Posted by Pat Bunn on September 06, 2021 at 23:12:27.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 06, 2021
I just changed the chip to move USC to 13.555236. To move it uo a bit in frequency. That's all I have for now. Have some new ones ordered
Pat
Re: What's this? ... USC !
Posted by John Davis on September 07, 2021 at 00:02:26.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 06, 2021
Am on my way to the field to look for "real USC" in just a few minutes. It's just below the passband of my CW filter.
Not sure how it'll do so late in the day. Propagation is distinctly different from a week ago...no short skip this afternoon, only longer paths, so I'm at a loss to guess what the evening may bring. Hope USC will be on tomorrow morning too, just in case.
Re: evening wspr2 hifer
Posted by swlem3 on September 07, 2021 at 00:03:21.
In reply to evening wspr2 hifer posted by swlem3 on September 03, 2021
So here's what the wspr2 hifer Labor day looked like in N. Texas. Number of decodes appears a bit down from the last couple days. Seems like a mid-US session... no trace of EDJ, unless Bob wasn't transmitting.
1440 -23 -0.3 13.555399 0 K3SIW EN52 7 1330 1450 -19 -0.2 13.555399 0 K3SIW EN52 7 1330 1500 -28 -0.6 13.555345 0 VA3ROM EN58 7 1877 1500 -27 -0.2 13.555400 0 K3SIW EN52 7 1330 1510 -28 -0.1 13.555400 0 K3SIW EN52 7 1330 1520 -20 -0.2 13.555399 0 K3SIW EN52 7 1330 1530 -23 -0.1 13.555400 0 K3SIW EN52 7 1330 1540 -20 0.0 13.555400 0 K3SIW EN52 7 1330 1550 -26 0.0 13.555400 0 K3SIW EN52 7 1330 1600 -28 -0.1 13.555401 0 K3SIW EN52 7 1330 1620 -27 -0.2 13.555400 0 K3SIW EN52 7 1330 1640 -27 -0.4 13.555343 0 VA3ROM EN58 7 1877 1710 -28 0.1 13.555401 0 K3SIW EN52 7 1330 1720 -27 0.1 13.555399 0 K3SIW EN52 7 1330 1730 -26 0.1 13.555399 0 K3SIW EN52 7 1330 1800 -27 0.0 13.555401 0 K3SIW EN52 7 1330 1850 -25 -0.8 13.555343 0 VA3ROM EN58 7 1877 2020 -26 -0.7 13.555339 0 VA3ROM EN58 7 1877 2030 -28 -0.0 13.555398 0 K3SIW EN52 7 1330 2040 -29 -0.1 13.555394 0 K3SIW EN52 7 1330 2110 -29 0.1 13.555394 0 K3SIW EN52 7 1330 2150 -26 -0.7 13.555339 1 VA3ROM EN58 7 1877
Ray
Re: What's this? ... USC !
Posted by Pat Bunn on September 07, 2021 at 00:09:57.
In reply to Re: What's this? ... USC ! posted by John Davis on September 07, 2021
John
I found another chip. Not the best place , but I'll leave it here to get some reports
It at 438 as of 8:09 pm edt
I'll move it soon.
Pat
Re: What's this? ... USC !
Posted by John Davis on September 07, 2021 at 05:17:21.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 07, 2021
When I got to the field, I could find no trace of "real USC" at the lower frequency, for reasons that are now clearer. There were faint RF smudges in the vicinity of .438 but (a) I didn't know to look more closely there, being away from any possibility of Internet connection, and (b) there was a particularly annoying band of codar lines obscuring that region. Conditions were deteriorating rapidly as sunset approached, but I'll try again in the morning.
"Fake USC"*/intended LCSC was still booming in, as was EH, but they were the only two in the lower half of the band other than NHVT at fair audibility. K6FRC was visible but not yet audible in the upper half.
John
(* The designations "real USC" and "fake USC" are a reference to a local joke at my expense. There are two towns in this region, one named Pleasanton and one named Riverton, with which I have a chronic mental block for reasons unknown. I may be speaking about one, but use the name of the other without even realizing I've done so...more often than not, saying "Pleasanton" when I mean the nearer town, "Riverton." This used to happen often enough that, when uncertainty sets in, friends have grown accustomed to asking "are we talking about real Pleasanton here, or 'fake' Pleasanton?")
Re: WM Lowfer on air
Posted by John Davis on September 07, 2021 at 05:52:08.
In reply to Re: WM Lowfer on air posted by Garry, K3SIW on September 06, 2021
Tried twice today for LowFER WM. First time was just before noon CDT into the lunch hour. Got excited over what looked like might be fragments of the space frequency of the FSK, but the mark frequency was entirely obliterated by the slightly wandery PLC that afflicts 185,301 Hz here in the daytime.
Tried again from just after dark until nearly midnight. This time there were fragments of RF at both 185,300.5 and 185,301 but too broken up to confirm an ID at either QRSS30 or 60. Will check again in upcoming nights.
Finally switched over to try for my monthly stalking of EAR. At least the static crashes have diminished some since last week.
Re: WM Lowfer on air
Posted by Mike N8OOU on September 07, 2021 at 12:35:32.
In reply to Re: WM Lowfer on air posted by John Davis on September 07, 2021
John,
Thanks for listening. This morning I measured the frequency to be 185300.35/185300.7 Hz. That's using the gps disciplined KIWI/Argo at qrss60. It looks like my measurement is very close to the report from Garry. I thought I was closer to 300.5, but maybe the summer heat aged the TCXO while the beacon was off.
Conditions here are very dry, along with a full load of green leaves in the trees.
Mike 73
Re: evening wspr2 hifer
Posted by WA1EDJ Bob on September 07, 2021 at 14:36:42.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 07, 2021
Yes, I was QRT for some listening tests.
Back on now.
Bob Re: evening wspr2 hifer
EDJ
Posted by John Davis on September 07, 2021 at 17:38:59.
In reply to Re: evening wspr2 hifer posted by WA1EDJ Bob on September 07, 2021
Coming into SE Kansas this morning, along with VA3ROM. Band conditions are highly variable, though, so there are many non-decodes as well, but when it's good, it's very good.
Re: What's this? ... USC !
Posted by John Davis on September 07, 2021 at 17:51:04.
In reply to Re: What's this? ... USC ! posted by John Davis on September 07, 2021
Sorry to report that "real" USC, despite coming in quite strongly at times this morning, is signing "LCSC" in an inverted pattern. The FSK shifts are spiky and the waveform is tilted, but not as badly as the one signing "USC" which was simultaneously visible.
Also present were EH, NC, 7P, WA1EDJ and VA3ROM.
I'd like to show a capture, but apparently I'll have to wait until this evening when I can reboot the field computer...its USB port is corrupting binary files again when I transfer them to the memory stick. The cure is to reboot periodically, or else never use the outboard USB mouse. Neither is a very good alternative.
Van Gogh EAR
Posted by John Davis on September 07, 2021 at 17:56:10.
In reply to Re: WM Lowfer on air posted by Mike N8OOU on September 07, 2021
That is, not complete. Got several "EA" from midnight do daybreak, but never a complete R. Apparently, the noise levels rose overnight rather than diminishing.
It'll be a few days before I can try again. We're under a low risk of severe storms tonight.
Re: What's this ... hifer band
Posted by swlem3 on September 07, 2021 at 22:37:33.
In reply to Re: What's this ... hifer band posted by John Davis on September 06, 2021
Thanks John for checking into this. I knew that this wasn't local qrm crud since it followed propagation... fading in and out.
Another mystery solved!
Ray
Re: evening wspr2 hifer
Posted by swlem3 on September 07, 2021 at 22:58:18.
In reply to Re: evening wspr2 hifer posted by WA1EDJ Bob on September 07, 2021
FB on the tests Bob. Hope you got some good info from the tests. Yep, EDJ is back into N. Texas and doing fine. I see John had copy in Kansas as well.
1450 -23 -1.1 13.555384 1 WA1EDJ EM83 7 1449 1450 -18 0.3 13.555395 0 K3SIW EN52 7 1330 1454 -19 -1.1 13.555385 1 WA1EDJ EM83 7 1449 1458 -17 -1.1 13.555385 1 WA1EDJ EM83 7 1449 1500 -17 0.1 13.555398 0 K3SIW EN52 7 1330 1502 -23 -1.1 13.555385 2 WA1EDJ EM83 7 1449 1506 -22 -1.1 13.555386 1 WA1EDJ EM83 7 1449 1510 -20 -1.1 13.555386 2 WA1EDJ EM83 7 1449 1510 -13 0.0 13.555398 0 K3SIW EN52 7 1330 1514 -23 -1.1 13.555386 0 WA1EDJ EM83 7 1449 1520 -21 0.1 13.555398 0 K3SIW EN52 7 1330 1522 -26 -1.1 13.555386 1 WA1EDJ EM83 7 1449 1526 -21 -1.2 13.555386 1 WA1EDJ EM83 7 1449 1530 -23 -1.2 13.555386 0 WA1EDJ EM83 7 1449 1530 -21 0.1 13.555399 0 K3SIW EN52 7 1330 1534 -29 -1.3 13.555386 0 WA1EDJ EM83 7 1449 1538 -26 -1.2 13.555386 1 WA1EDJ EM83 7 1449 1540 -26 0.0 13.555399 0 K3SIW EN52 7 1330 1542 -27 -1.1 13.555387 0 WA1EDJ EM83 7 1449 1546 -23 -1.2 13.555387 0 WA1EDJ EM83 7 1449 1550 -26 -1.3 13.555386 1 WA1EDJ EM83 7 1449 1554 -23 -1.1 13.555386 0 WA1EDJ EM83 7 1449 1558 -28 -1.0 13.555386 0 WA1EDJ EM83 7 1449 1602 -26 -1.1 13.555387 1 WA1EDJ EM83 7 1449 1606 -26 -1.1 13.555388 0 WA1EDJ EM83 7 1449 1610 -24 -1.1 13.555388 0 WA1EDJ EM83 7 1449 1610 -25 0.1 13.555400 0 K3SIW EN52 7 1330 1614 -17 -1.1 13.555389 0 WA1EDJ EM83 7 1449 1618 -23 -1.1 13.555387 2 WA1EDJ EM83 7 1449 1622 -21 -1.0 13.555387 0 WA1EDJ EM83 7 1449 1626 -25 -1.2 13.555387 2 WA1EDJ EM83 7 1449 1634 -30 -1.2 13.555389 0 WA1EDJ EM83 7 1449 1640 -26 0.1 13.555401 0 K3SIW EN52 7 1330 1658 -27 -1.2 13.555387 1 WA1EDJ EM83 7 1449 1702 -22 -1.2 13.555388 0 WA1EDJ EM83 7 1449 1718 -23 -1.2 13.555386 2 WA1EDJ EM83 7 1449 1720 -26 0.3 13.555398 0 K3SIW EN52 7 1330 1722 -25 -1.1 13.555386 1 WA1EDJ EM83 7 1449 1726 -23 -1.2 13.555387 0 WA1EDJ EM83 7 1449 1730 -16 -1.2 13.555386 1 WA1EDJ EM83 7 1449 1730 -25 0.2 13.555399 0 K3SIW EN52 7 1330 1734 -19 -1.2 13.555386 1 WA1EDJ EM83 7 1449 1738 -24 -1.1 13.555387 0 WA1EDJ EM83 7 1449 1740 -18 0.2 13.555400 0 K3SIW EN52 7 1330 1742 -24 -1.3 13.555386 1 WA1EDJ EM83 7 1449 1746 -24 -1.2 13.555386 0 WA1EDJ EM83 7 1449 1750 -26 -1.2 13.555386 1 WA1EDJ EM83 7 1449 1750 -15 0.2 13.555399 0 K3SIW EN52 7 1330 1754 -27 -1.2 13.555386 1 WA1EDJ EM83 7 1449 1758 -23 -1.2 13.555386 0 WA1EDJ EM83 7 1449 1800 -9 0.2 13.555398 0 K3SIW EN52 7 1330 1802 -27 -1.1 13.555385 0 WA1EDJ EM83 7 1449 1806 -24 -1.2 13.555385 1 WA1EDJ EM83 7 1449 1810 -24 -1.1 13.555385 0 WA1EDJ EM83 7 1449 1810 -22 0.1 13.555398 0 K3SIW EN52 7 1330 1814 -28 -1.3 13.555384 0 WA1EDJ EM83 7 1449 1818 -22 -1.2 13.555383 1 WA1EDJ EM83 7 1449 1820 -25 0.1 13.555396 0 K3SIW EN52 7 1330 1822 -23 -1.2 13.555383 1 WA1EDJ EM83 7 1449 1826 -26 -1.1 13.555383 0 WA1EDJ EM83 7 1449 1830 -22 -1.3 13.555383 1 WA1EDJ EM83 7 1449 1830 -28 -0.1 13.555396 0 K3SIW EN52 7 1330 1834 -28 -1.3 13.555383 0 WA1EDJ EM83 7 1449 1838 -28 -1.3 13.555384 1 WA1EDJ EM83 7 1449 1842 -25 -1.3 13.555383 0 WA1EDJ EM83 7 1449 1850 -28 0.0 13.555396 0 K3SIW EN52 7 1330 1900 -29 0.2 13.555398 1 K3SIW EN52 7 1330 1910 -28 0.0 13.555401 0 K3SIW EN52 7 1330 1920 -27 0.0 13.555397 0 K3SIW EN52 7 1330 1926 -26 -1.3 13.555387 1 WA1EDJ EM83 7 1449 1930 -26 -1.3 13.555387 0 WA1EDJ EM83 7 1449 1930 -29 0.0 13.555397 0 K3SIW EN52 7 1330 1940 -27 -0.1 13.555398 0 K3SIW EN52 7 1330 1958 -31 -1.3 13.555384 1 WA1EDJ EM83 7 1449 2034 -19 -1.2 13.555385 0 WA1EDJ EM83 7 1449 2038 -20 -1.2 13.555385 0 WA1EDJ EM83 7 1449 2040 -24 -0.0 13.555396 0 K3SIW EN52 7 1330 2042 -24 -1.3 13.555383 0 WA1EDJ EM83 7 1449 2046 -21 -1.2 13.555383 1 WA1EDJ EM83 7 1449 2050 -21 -1.1 13.555384 1 WA1EDJ EM83 7 1449 2050 -27 0.2 13.555396 0 K3SIW EN52 7 1330 2054 -22 -1.3 13.555385 1 WA1EDJ EM83 7 1449 2058 -23 -1.2 13.555385 0 WA1EDJ EM83 7 1449 2100 -24 -0.0 13.555398 0 K3SIW EN52 7 1330 2102 -24 -1.2 13.555385 0 WA1EDJ EM83 7 1449 2106 -24 -1.2 13.555385 0 WA1EDJ EM83 7 1449 2110 -21 -1.3 13.555384 1 WA1EDJ EM83 7 1449 2110 -20 -0.0 13.555395 0 K3SIW EN52 7 1330 2114 -23 -1.3 13.555384 1 WA1EDJ EM83 7 1449 2118 -22 -1.3 13.555384 1 WA1EDJ EM83 7 1449 2120 -23 0.1 13.555397 0 K3SIW EN52 7 1330 2122 -26 -1.3 13.555385 1 WA1EDJ EM83 7 1449 2126 -21 -1.2 13.555385 0 WA1EDJ EM83 7 1449 2130 -22 -1.3 13.555384 0 WA1EDJ EM83 7 1449 2130 -25 -0.0 13.555396 0 K3SIW EN52 7 1330 2134 -21 -1.3 13.555384 1 WA1EDJ EM83 7 1449 2138 -27 -1.3 13.555384 0 WA1EDJ EM83 7 1449 2140 -24 0.1 13.555396 0 K3SIW EN52 7 1330 2142 -22 -1.3 13.555384 1 WA1EDJ EM83 7 1449 2146 -21 -1.3 13.555385 1 WA1EDJ EM83 7 1449 2150 -24 -1.5 13.555338 0 VA3ROM EN58 7 1877 2150 -27 -1.3 13.555384 0 WA1EDJ EM83 7 1449 2150 -23 -0.0 13.555396 0 K3SIW EN52 7 1330 2154 -24 -1.3 13.555383 0 WA1EDJ EM83 7 1449 2158 -21 -1.3 13.555383 1 WA1EDJ EM83 7 1449 2200 -15 0.0 13.555396 0 K3SIW EN52 7 1330 2202 -21 -1.3 13.555384 2 WA1EDJ EM83 7 1449 2206 -32 -1.1 13.555385 0 WA1EDJ EM83 7 1449 2210 -21 -1.2 13.555384 1 WA1EDJ EM83 7 1449 2210 -23 0.1 13.555397 0 K3SIW EN52 7 1330 2220 -29 0.2 13.555395 0 K3SIW EN52 7 1330
Ireland’s Longwave Radio RTÉ 252 Is Back on the Air
Posted by Mike Terry on September 08, 2021 at 03:46:21.
by Paul Riismandel on September 6, 2021 in International, Radio Bands
Thanks to reader Paul Bailey I’ve recently been alerted that Ireland’s long-running longwave (LW) radio station RTÉ 252 is back on the air, after a period of maintenance beginning in June of this year. The service rebroadcasts public broadcaster RTÉ Radio 1, reaching longer distances than the mediumwave AM band – no longer in use by RTÉ – and the FM band.
As Bailey explained in a 2016 guest post, RTÉ 252 was founded when the broadcaster acquired the transmitter site from a commercial radio operation that lasted from 1989 to 2002. Able to reach distances of up to 1200 miles with fidelity roughly equivalent to conventional AM radio – with superior quality and reliability than shortwave – RTÉ 252 is able to serve a significant Irish diaspora in the UK. Though the same programming is available globally online, that still makes it inaccessible to many motorists and listeners with limited or no internet service.
Situated below the conventional AM band at 30 – 300 KHz, LW was never officially used for broadcasting in the Americas, though it’s had a long history in Europe, Asia and Africa. However, the long wavelengths mean that the transmission towers need to be very tall and situated on a large parcel of land in order to broadcast efficiently, using hundreds of kilowatts of power. Currently RTÉ broadcasts with 150 kilowatts in the daytime – a fraction of the 500 kw it’s licensed for – which is still 3x what the most powerful clear channel AM stations may use in the US.
All of that means a LW station is relatively expensive to operate and maintain, which is why RTÉ proposed shutting down the 252 operation back in 2014. Outcry from listeners across Ireland and the UK caused the broadcaster to cancel the shutdown in 2019, ultimately deciding to conduct maintenance this year to keep the service going into the future.
https://www.radiosurvivor.com/2021/09/irelands-longwave-radio-rte-252-is-back-on-the-air/
Re: evening wspr2 hifer
Posted by John Davis on September 08, 2021 at 06:04:02.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 07, 2021
Lots of WA1EDJ WSPR here today, some VA3ROM. No short-hop whatsoever, though--nobody nearer than 600 miles. VA3ROM was visible much more often than this, but not all WSPR slots decoded, even including some that looked OK by eye.
* UTC Date: 2021-09-07 Reporter: AE0CQ RcvGrid: EM27kc Mode: 2 Time Call MHz SNR Drift Grid Pwr RGrid km az 16:06 WA1EDJ 13.555389 -17 0 EM83 0.005 EM27kc 1167 294 16:20 VA3ROM 13.555342 -20 0 EN58jk 0.005 EM27kc 1349 203 17:10 WA1EDJ 13.555388 -28 0 EM83 17:14 WA1EDJ 13.555389 -22 0 EM83 17:18 WA1EDJ 13.555389 -25 0 EM83 17:22 WA1EDJ 13.555389 -25 0 EM83 17:26 WA1EDJ 13.555389 -22 1 EM83 17:30 WA1EDJ 13.555389 -23 1 EM83 17:50 WA1EDJ 13.555389 -27 0 EM83 17:54 WA1EDJ 13.555389 -21 0 EM83 17:58 WA1EDJ 13.555389 -19 1 EM83 18:02 WA1EDJ 13.555388 -24 1 EM83 18:06 WA1EDJ 13.555389 -18 0 EM83 18:10 WA1EDJ 13.555389 -21 0 EM83 18:14 WA1EDJ 13.555389 -25 0 EM83 18:18 WA1EDJ 13.555389 -24 0 EM83 18:22 WA1EDJ 13.555389 -20 0 EM83 18:26 WA1EDJ 13.555389 -21 0 EM83 18:30 VA3ROM 13.555343 -26 0 EN58jk 18:30 WA1EDJ 13.555389 -22 0 EM83 18:34 WA1EDJ 13.555389 -25 1 EM83 18:38 WA1EDJ 13.555389 -27 0 EM83 18:42 WA1EDJ 13.555389 -22 1 EM83 18:46 WA1EDJ 13.555389 -21 1 EM83 18:50 WA1EDJ 13.555389 -24 0 EM83 18:54 WA1EDJ 13.555389 -22 0 EM83 18:58 WA1EDJ 13.555389 -16 1 EM83 19:06 WA1EDJ 13.555389 -26 1 EM83 19:10 WA1EDJ 13.555389 -22 1 EM83 19:14 WA1EDJ 13.555389 -23 1 EM83 19:18 WA1EDJ 13.555389 -28 1 EM83 19:22 WA1EDJ 13.555389 -22 0 EM83 19:26 WA1EDJ 13.555389 -23 1 EM83 19:30 WA1EDJ 13.555389 -20 0 EM83
Re: What's this? ... USC !
Attached is a capture from late morning of the watering hole, showing the inverted LCSC ID. For a time LCSC-USC and NC both simultaneously grew very loud, producing intermodulation distortion in the audio chain. Note that WA1EDJ became weakest when NC was strongest, and that EH and VA3ROM signal strengths were also inversely proportional to each other, while 7P remained relatively consistent.
---------------------------------------------------------------
File Attachment 1: 7sep06.jpg
CKN on 76.2 kHz
Noticed station CKN active on 76.2 kHz from BC, Canada last night. Haven't seen that station for quite awhile. It's still coming in as of 1200Z. CFH in Halifax, Canada is also in there on 73.6 kHz, but with just a carrier.
73, Garry, K3SIW, EN52ta, Elgin, IL
Epson availability (8002DC SHB)
Posted by John K5MO on September 08, 2021 at 13:21:08.
Unless I read the online catalog wrong, it looks like DigiKey is not stocking the 8002's any more. I found inventory (and programming) via DOVE electronics though, with reasonable pricing. Will let you know if I get them
The Epson page shows as "Discontinued" as well. It might be available in other packages however.
Re: Epson availability (8002DC SHB)
Posted by Pat Bunn on September 08, 2021 at 13:57:56.
In reply to Epson availability (8002DC SHB) posted by John K5MO on September 08, 2021
I just bought about ten from Digi Key yesterday. They have shipped so they are in stock. They are confusing in the way they call them out as a special order item.
Pat Re: What's this? ... USC !
N4LTA
Posted by Pat Bunn on September 08, 2021 at 15:35:19.
In reply to Re: What's this? ... USC ! posted by John Davis on September 08, 2021
John
I did some work on USC (LCSC on your screen shot) yesterday. I changed a resistor value to speed up the voltage change to get rid of any time constant in the gate of the switching transistor. I changed the software to make the ID "USC" and inverted the ID. I also lowered amount of frequency change. The voltage on the Epsom chip changes from 5.4 to 5.0 volts. I did not measure the change in frequency but I can hear the difference in tone. This is essentially the same circuit that worked on the old USC and some other beacons with the same Epsom chip although Epson may have made changes in ten years.
Hopefully things are better. When I observe the frequency change here here the frequencies change quickly and but the small change and overshoot is very hard to observe. The oscilloscope views and spectrum analyzer measurements look normal. My frequency meter takes quite a bit of time to measure down to Hz and makes it impossible to look at the transisition.
Re: WM Lowfer on air
Posted by John Davis on September 08, 2021 at 16:12:02.
In reply to Re: WM Lowfer on air posted by Mike N8OOU on September 07, 2021
This morning I measured the frequency to be 185300.35/185300.7 Hz.
Thanks, Mike, that makes me more confident that the snippets of carrier I saw were likely from WM. My initial report was only a visual approximation, but last night when I was finally able to extract the Argo captures onto a flash drive, I opened a couple and magnified them for examination (sample below).
A better approximation of what I saw is, therefor, 185300.56 and 185300.9 Hz on the raw QRSS60 capture near 0234 UTC. From an earlier check of WWV, I knew the receiver output to be 0.74 to 0.75 ppm higher than the dial setting, which translates to about 0.14 Hz at 185.3 kHz. So, after subtracting 0.14 from the values on my Argo trace, our readings appear to agree within about 0.01 Hz for Δf and within 0.02 Hz for absolute frequency, which is pretty close for readings taken hours apart!
Re: Epson availability (8002DC SHB)
Posted by John K5MO on September 08, 2021 at 16:33:55.
In reply to Re: Epson availability (8002DC SHB) posted by Pat Bunn on September 08, 2021
Well, that's good news Pat. I ordered from Dove and they are equally affordable. I got my others from Digikey before and they do a fantastic job of quick pack and ship.
I'll report on Dove when/if I get them
Re: Epson availability (8002DC SHB)
Posted by Pat Bunn on September 08, 2021 at 16:58:11.
In reply to Re: Epson availability (8002DC SHB) posted by John K5MO on September 08, 2021
I have used Dove also. They sometime have some really good deals. DigiKey method of ordering Epson chips is really confusing, but they ship quickly.
Pat
Re: What's this? ... USC !
Posted by swlem3 on September 08, 2021 at 20:10:55.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 08, 2021
Pat, I'm seeing pretty much the same waveform on USC that I originally reported. Sigs not as strong today, so I'm not going to post another pic at this time. Perhaps John can provide verification to my report.
Ray ... N. Central Texas
Re: What's this? ... USC !
Posted by Pat Bunn on September 08, 2021 at 21:10:49.
In reply to Re: What's this? ... USC ! posted by swlem3 on September 08, 2021
Ray,
I have set up ARGO on my local K3 in the shop and with no antenna I see the same jitter. It looks slow about 5-10 times in one Dit in ARGO.
Never seen this before - It may be a property of the new version of the chip.
The output on these chips is UGLY on my 400 MHz analog scope.
It is bypassed with a .1uF cap as close as I can get (SMD cap). The specs ask for a .01uF bypass on the smaller CA and Ce chips. I may change the bypass to .01uF and see, but I doubt that is the problem.
Later I will try just running the oscillator at one frequency, and see if the jitter is there.
Thanks for the report.
Pat Re: What's this? ... USC !
N4LTA
Posted by swlem3 on September 08, 2021 at 21:50:33.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 08, 2021
Ok Pat, still seeing your signal as I type, btw. I'm sure you'll figure it out. The hobby always provides "learning experiences" no matter how long you've been in it. At least that's been my experience.
Ray
Re: What's this? ... USC !
Posted by John Davis on September 08, 2021 at 23:53:19.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 08, 2021
Attached is what I was seeing in Kansas this afternoon, with both of Pat's beacons simultaneously visible. About an hour earlier, when I was not tuned so high and couldn't watch false USC, I was also seeing MTI, bits of ROM, and yet another odd signal wandering between .280 and .340 with what looked like some sort of modulation attempt. I may post a capture of that one separately if it recurs any time soon.
As for "real" USC, the ID is definitely USC now and is right-side-up. There is still a modest overshoot and distinct tilt. I don't think the gate of the FET was responding too slowly, Pat; the rise and fall times appear plenty fast, but it's as if the modulating voltage is being passed through a network with inadequate low frequency response. Not sure what sort of jitter you are referring to, but can you check the modulator (regulator) output with your scope (DC-coupled) and see if the voltage is steady in both high and low conditions, or whether it shifts over several seconds in inverse proportion to the tilt I'm seeing?
(If you'd be willing to email the schematic of the current circuit version, perhaps that might also suggest something.)
John
---------------------------------------------------------------
File Attachment 1: 8sep007.jpg
Re: What's this? ... USC !
John
I did a few things that cleaned it up slightly but it still overshoots. The voltage stabilizes pretty quickly as the FET switches but I will recheck it again. I have a receiving set up here using my K3 with no antenna and have been testing.
I don't have a copy of the schematic drawn, but it is simply a LM317L regulator with two pots in series to ground - the one closest to ground has a 2N7002 FET shorting it to ground when the keying chip send it a "high" output. I use a 240 ohm resistor from output pin to adj pin, and then the series pots to ground. The pot nearest ground is a 500 ohm and the other is a 2K. The voltage changes from approximately 5.3 volts to 5.0 volts when the 500 ohm pot is shorted by the FET.
Looking at a magnified signal looked like the oscillator was FMing , but I don't think that is happening. I re-check the V regulator again with a very accurate VOM and also look at it again on the scope. I also have note the the oscillator seems to have more drift than I remember on past versions. Right now it is located in a n air conditioned room.
I have attached a photo link of what I am seeing here on the K3
https://hosting.photobucket.com/images/i/pbunn9801/beacon_usc.jpg
Thanks for the assistance.
Pat Re: What's this? ... USC !
N4LTA
Posted by Pat Bunn on September 09, 2021 at 01:40:45.
In reply to Re: What's this? ... USC ! posted by Pat Bunn on September 09, 2021
John,
Just measured the voltage at the Oscillator V+ terminal. Fast transition and steady down to the millivolt level. I was surprised how stable it was.
I have a video of it but it is 46 Mbytes.
Pat
Re: What's this? ... USC !
Posted by swlem3 on September 09, 2021 at 21:07:14.
In reply to Re: What's this? ... USC ! posted by John Davis on September 08, 2021
Sept. 9, 2021 ... screenshot from N. Central Texas:
https://www.dropbox.com/s/0iwvfop4s2hpdts/usc2.jpg?dl=0
Ray... swlem3
Re: What's this? ... USC !
Posted by John Davis on September 10, 2021 at 01:17:43.
In reply to Re: What's this? ... USC ! posted by swlem3 on September 09, 2021
Looks very like what I saw earlier today except my reception had no gaps in it. Wonder what that's all about?
Re: WM Lowfer - Wed/Thu
Posted by John Davis on September 10, 2021 at 01:52:04.
In reply to Re: WM Lowfer on air posted by John Davis on September 08, 2021
Last night was very similar to Monday, but there may be improvement tonight. (No results for Tuesday evening because I got chased from the field by storms.)
Blitzortung showed a little higher strike number Wednesday than Monday, but the receiver S-meter showed roughly the same noise. Still, I managed a small percentage more fragments of both signals.
Tonight, I had no hope for things to be better and was prepared to pack it in at sunset, as I am already slipping behind schedule for The LOWDOWN deadline. However, the count is fractionally lower and the noise level was down significantly, at least up to sunset. At that point, one full FSK60 WM was visible in the QRSS30 window! So, even though the lightning count is now a smidgen higher than it was before sunset, I'll give it a few more hours.
If I have a couple of good WMs by then, I'll try for EAR in the wee hours. But if the noise is worse, I'll have to punt until after deadline weekend. The monitoring session has been running for 36 hours now; the USB port driver is likely to corrupt binary files enroute to the flash drive, so there'll be no file transfer chances tonight unless I have to shut down the computer--which I won't do if there seems a realistic prospect of snagging something further. Thus, if there's NOT a further report from me before midday Friday, consider that a hopeful sign! Re: WM Lowfer - Wed/Thu
John
Posted by Mike N8OOU on September 10, 2021 at 02:33:22.
In reply to Re: WM Lowfer - Wed/Thu posted by John Davis on September 10, 2021
John;
Thanks for your super effort to receive the WM beacon. I think this is the hardest time of the year for my signal to show up at your antenna. I have checked the dials and gauges here to make sure the electrons are doing their normal routine. Every thing is running the same as it has been the past year. As November rolls in, I'm sure we will see the signal return.
Mike 73
Re: WM Lowfer - Wed/Thu
Posted by John Davis on September 10, 2021 at 17:03:18.
In reply to Re: WM Lowfer - Wed/Thu posted by Mike N8OOU on September 10, 2021
One complete WM last night, then some EARS--not bad considering how noise levels rose before midnight despite a slight decrease in lightning strike counts. Feared I might be spinning my wheels, but my stubbornness was apparently rewarded. Pictures tonight after I shut down in the field. Will look for additional WMs next week.
Re: What's this? ... USC etc
Posted by John Davis on September 10, 2021 at 17:13:55.
In reply to Re: What's this? ... USC ! posted by John Davis on September 10, 2021
At mid-morn both fake and real USC were present, and EH, NC, 7P, WA1EDJ, MTI, and VA3ROM at the watering hole. Elsewhere, WV was weak and drifting upward slowly, TON was fair, ODX ranged from weak to good, and KAH was fair.
Those latter two had been absent here during August, but have returned in recent mornings. WAS had also been absent for weeks, and has not been seen yet today, but was good early Tuesday afternoon for a couple of minutes.
Re: evening wspr2 hifer
Posted by swlem3 on September 11, 2021 at 01:24:03.
In reply to evening wspr2 hifer posted by swlem3 on September 03, 2021
Was away from home most of the day, just let the system run decoding wspr2 hifer's. Looks like prop was pretty good. Here's the breakdown:
KA9SZX ... 4 spots best -16db
VA3ROM ... 6 spots best -22db
K3SIW ... 60 spots best -8db
WA1EDJ ... 93 spots best -12db
All spots were uploaded to wsprnet.org
Ray ... Elad FDM-S2 w/ randow wire vertical
More Freq shifting an oscillator
Posted by John K5MO on September 11, 2021 at 12:45:02.
In reply to Re: Freq shifting an oscillator w/chip select posted by Robert, VA3ROM on September 05, 2021
Hi All,
I did get the Epson to respond with an appropriate frequency shift. It is a lot of Edison, as the shift is a function of voltage on the control pin AND Vcc. I did arrive at a practical set of levels. I'll program the Tiny with the appropriate QRSS CW keying and try and tie this all up for now.
Earlier this week, I did get an adjustable duty cycle PWM output running off the same Tiny, but I think with the filtering needed to create a usable DC level, it seemed to be more trouble than it was worth. Still, it's a possibility. I've also thought of using two output pins from the uControllers CW output (one for the CW, the other for the NOT CW) ORed to the Epson control pin/Vcc together with a couple of forward diode drops to set the differing DC levels. That might work too, and might be the most stable configuration.
Waiting for Dove to come through with a collection of 8002's :-), and I sure wish I knew more C++ ! Re: Epson availability (8002DC SHB)
Posted by John K5MO on September 11, 2021 at 12:50:39.
In reply to Re: Epson availability (8002DC SHB) posted by Pat Bunn on September 08, 2021
Hi Pat,
Yes, I usually use Digikey (it's nice to patronize a ham-originated business!) and they DO ship amazingly fast and have good customer service.
I'll go back to them now that I know that there's an actual solution to their Rubix Cube ordering process for these things
Old "JB" freq ok for MFSK?
Posted by John K5MO on September 11, 2021 at 16:09:44.
Hello All,
I finally got the amount of Edison time in to work on the MFSK version of "JB" (see screen capture of it on my bench into a dummy load https://www.qsl.net/k5mo/ ). I think the shift is adequate, but we'll find out.
JB, which was a CW only QRSS signal last fall, was on 13.55527 ish as a single freq. Is it OK to use it for MFSK? I also have a 13555.42 oscillator here too if that's a better choice if it matters.
Fun stuff. Going to change the battery pack to some small Lipos, and install a Chineseium MPPT solar controller board I've had good luck with, and see how this goes.
Thanks to all who helped!
Re: Old "JB" freq ok for MFSK?
Posted by WA1EDJ Bob on September 11, 2021 at 17:21:46.
In reply to Old "JB" freq ok for MFSK? posted by John K5MO on September 11, 2021
I'm seeing a pretty good sig on your HiFER grabber page.
Send your address. I'm ready to ship the QCX RX. Probably go out Monday.
Bob Re: Old "JB" freq ok for MFSK?
EDJ
Posted by John K5MO on September 11, 2021 at 17:57:57.
In reply to Re: Old "JB" freq ok for MFSK? posted by WA1EDJ Bob on September 11, 2021
Hi Bob,
Sent address via Gmail, thank you!
I am sure the signal will improve when the chip is in a board with an actual RF ground and a proper output network. Hopefully I can get to this tomorrow. Right now things are clipleaded and protoboarded together, which is non-great, but handy for Edison work.
John
Re: Old "JB" freq ok for MFSK?
Posted by WA1EDJ Bob on September 11, 2021 at 18:10:55.
In reply to Re: Old "JB" freq ok for MFSK? posted by John K5MO on September 11, 2021
Thanks John! I'll get it out on Monday. Should not take long. You are closer than I thought. Probably why I don't copy you and you me.
I will be looking on DJJ grabber. He does see Pat in Spartanburg, SC.
Later!
Bob Re: Old "JB" freq ok for MFSK?
EDJ
Posted by John Davis on September 11, 2021 at 19:32:45.
In reply to Old "JB" freq ok for MFSK? posted by John K5MO on September 11, 2021
Might quibble whether 2FSK qualifies as MFSK but it's a fine frequency for it. Looks like it might be a tad wider shift than necessary, but that shouldn't be a problem at .270. Could be an issue in the relatively more crowded .420 region, though, especially if subject to drift.
Re: evening wspr2 hifer
Posted by swlem3 on September 11, 2021 at 23:45:37.
In reply to evening wspr2 hifer posted by swlem3 on September 03, 2021
Logged a new wspr2 hifer station today... WB8ELK. Propagation provided many decodes with 5 wspr2 stations checking into N. Central Texas.
WB8ELK ... 2 decodes ... best -27db
VA3ROM ... 14 ... best -20db
KA9SZX ... 16 ... best -22
K3SIW ... 45 ... best -5 (wow... strong decode)
WA1EDJ ... 96 ... best -13
This station would be doing better with the hifers except that there is annoying powerline qrm at hf that can be reduced somewhat with software noise blanking. Using a random wire vertical isn't the best antenna in the midst of that noise. I'm hoping that I can spare some time to start work on a 3/4 inch copper pipe loop soon. Hope to null the qrm and do much better with hifer copy.
Ray
Re: evening wspr2 hifer
Posted by swlem3 on September 12, 2021 at 01:18:26.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 11, 2021
addendum... hifer prop is still doing well at this time 0116z. Noting VA3ROM frequently. Even decoded at a -13db... very good signal.
Ray
11- September WSPR
Posted by Ed Holland on September 12, 2021 at 01:23:28.
Good results so far today with HiFERs and particularly WSPR at the watering hole. Monitoring today with WSTJ caught the following:
2034 -28 -1.7 13.561506 1 WA1EDJ EM83 7 3652
2054 -23 -0.4 13.561507 2 WA1EDJ EM83 7 3652
2058 -26 -0.7 13.561507 0 WA1EDJ EM83 7 3652
2102 -23 -1.0 13.561506 1 WA1EDJ EM83 7 3652
2110 -22 -0.3 13.561505 1 WA1EDJ EM83 7 3652
2110 -26 -0.7 13.561519 0 K3SIW EN52 7 2962
2114 -28 -0.1 13.561506 2 WA1EDJ EM83 7 3652
2118 -28 -0.5 13.561506 2 WA1EDJ EM83 7 3652
2122 -22 -0.4 13.561507 0 WA1EDJ EM83 7 3652
2130 -25 -1.0 13.561506 0 WA1EDJ EM83 7 3652
2130 -27 -1.5 13.561519 0 K3SIW EN52 7 2962
2134 -28 -0.2 13.561506 1 WA1EDJ EM83 7 3652
2138 -21 -0.3 13.561506 1 WA1EDJ EM83 7 3652
2150 -22 -0.2 13.561506 1 WA1EDJ EM83 7 3652
2154 -23 -1.3 13.561507 1 WA1EDJ EM83 7 3652
2158 -26 -0.1 13.561507 2 WA1EDJ EM83 7 3652
2200 -26 -1.9 13.561519 0 K3SIW EN52 7 2962
2202 -23 -0.5 13.561506 1 WA1EDJ EM83 7 3652
2210 -27 -2.0 13.561505 0 WA1EDJ EM83 7 3652
2210 -26 -2.3 13.561519 0 K3SIW EN52 7 2962
2218 -22 -1.0 13.561507 1 WA1EDJ EM83 7 3652
2220 -24 -1.0 13.561519 0 K3SIW EN52 7 2962
2222 -27 -0.5 13.561507 0 WA1EDJ EM83 7 3652
2230 -23 -1.3 13.561506 0 WA1EDJ EM83 7 3652
2230 -23 -1.6 13.561519 0 K3SIW EN52 7 2962
2234 -24 -0.1 13.561506 2 WA1EDJ EM83 7 3652
2238 -25 -0.3 13.561505 0 WA1EDJ EM83 7 3652
2240 -25 -0.9 13.561519 0 K3SIW EN52 7 2962
2242 -25 -1.3 13.561505 1 WA1EDJ EM83 7 3652
2246 -24 -0.6 13.561506 0 WA1EDJ EM83 7 3652
2250 -25 -0.3 13.561506 1 WA1EDJ EM83 7 3652
2258 -23 -0.9 13.561505 4 WA1EDJ EM83 7 3652
2302 -24 -1.5 13.561506 1 WA1EDJ EM83 7 3652
2310 -22 -0.0 13.561505 0 WA1EDJ EM83 7 3652
2314 -22 -0.6 13.561506 2 WA1EDJ EM83 7 3652
2318 -20 -0.1 13.561506 1 WA1EDJ EM83 7 3652
2322 -22 -0.2 13.561506 1 WA1EDJ EM83 7 3652
2328 -26 0.5 13.561534 0 WB8ELK EM64 7 3266
2348 -24 1.4 13.561535 0 WB8ELK EM64 7 3266
0000 -26 -0.1 13.561517 0 K3SIW EN52 7 2962
0008 -23 0.2 13.561535 0 WB8ELK EM64 7 3266
0010 -26 -1.3 13.561519 0 K3SIW EN52 7 2962
SIW and EDJ often visit when conditions are favourable but WBELK is a newcomer.
In the other modes NC, maybe XIL, 7P. At first, I thought there was a fault with the receiving dipol because it was really quiet compared to the long wire. However, there was simply something very odd with conditions, as it recovered duing the day to provide some nice catches.
73s
Ed
WB8ELK testing on 13.555418 WSPR ELK on QRSS
Posted by Bill WB8ELK on September 12, 2021 at 05:41:11.
I'm doing some code mods on my HiFer WSPR and QRSS board design that Mark KA9SZX is using in EN40. I will have WB8ELK (WSPR) and ELK on CW and QRSS running for a few days on 13.555418 from EM64oj in north Alabama. KA9SZX is currently on 13.555410. - Bill WB8ELK
Re: Old "JB" freq ok for MFSK?
Posted by John K5MO on September 12, 2021 at 12:53:07.
In reply to Re: Old "JB" freq ok for MFSK? posted by John Davis on September 11, 2021
Hi John
OK, we'll go with FSCW :-)
I'm pretty sure I can reduce the shift a bit after I get this onto a proper PCB.
Thanks for the answers!. BTW, DOVE did indeed ship the oscillators quickly and they are quite affordable.
John
Remote 22 m band grabber QRV via Ottawa for a few hours.
Posted by Andy G0FTD on September 12, 2021 at 15:24:09.
https://qsl.net/g0ftd/grabber.htm
End about 1930 UTC.
Good luck.
73 de Andy
Re: Remote 22 m band grabber QRV via Ottawa for a few hours.
Posted by John Davis on September 12, 2021 at 15:55:23.
In reply to Remote 22 m band grabber QRV via Ottawa for a few hours. posted by Andy G0FTD on September 12, 2021
Ottawa looks like the place to be! Seeing USC/LCSC, NC, SIW slant, "real" USC, what's probably snippets of ELK, definite SZX, K3SIW WSPR+QRSS, WA1EDJ, MTI at times, ROM at times, and WM! Pretty thorough collection, albeit scrunched somewhat on the vertical axis to fit in so much BW on the small window.
Re: WB8ELK testing on 13.555418 WSPR ELK on QRSS
Posted by Ed Holland on September 12, 2021 at 16:43:35.
In reply to WB8ELK testing on 13.555418 WSPR ELK on QRSS posted by Bill WB8ELK on September 12, 2021
Bill,
ELK received several times in the last 24 Hours here in CA. These are my most uo to date WSPR decode summaries:
0508 -30 1.9 13.561535 0 WB8ELK EM64 7 3266
0528 -28 1.8 13.561536 0 WB8ELK EM64 7 3266
0548 -28 1.8 13.561536 0 WB8ELK EM64 7 3266
1450 -24 0.7 13.561522 0 K3SIW EN52 7 2962
1608 -27 2.8 13.561538 0 WB8ELK EM64 7 3266
73s
Ed
Re: Remote 22 m band grabber QRV via Ottawa for a few hours.
Posted by Andy G0FTD on September 12, 2021 at 17:39:28.
In reply to Re: Remote 22 m band grabber QRV via Ottawa for a few hours. posted by John Davis on September 12, 2021
Hi John,
I've made a tweak especially for you ;-)
I've given the grab file a bit more vertical pixels on the website in the hope
that it might make things a bit better.
The raw file if required can be viewed directly at https://qsl.net/g0ftd/hf1.jpg
if required.
73 de Andy
Re: Remote 22 m band grabber QRV via Ottawa for a few hours.
Posted by John Davis on September 12, 2021 at 20:17:15.
In reply to Re: Remote 22 m band grabber QRV via Ottawa for a few hours. posted by Andy G0FTD on September 12, 2021
Thanks Andy, looks like that may help.
Re: Is F back?
Posted by swlem3 on September 13, 2021 at 15:37:22.
In reply to Is F back? posted by WA1EDJ Bob on August 20, 2021
He's baaaaack! "F"...
www.dropbox.com/s/enyi8a2awgdtadk/f2.jpg?dl=0
Ray... N. Central Texas
Re: Is F back?
Posted by WA1EDJ Bob on September 13, 2021 at 18:34:49.
In reply to Re: Is F back? posted by swlem3 on September 13, 2021
Yes! and on the DJJ grabber he just went QRV at 1517. You can see a distinct start of his sig. Will we ever know?
Bob Re: Is F back?
EDJ
Posted by swlem3 on September 13, 2021 at 22:07:19.
In reply to Re: Is F back? posted by WA1EDJ Bob on September 13, 2021
Hard 'tellin Bob if he'll ever post his presence on this board. Really do wish I knew the approximate qth of F. If I had a loop, I'd get a general bearing on it.
Ray
Re: Is F back?
Posted by WA1EDJ Bob on September 13, 2021 at 23:55:33.
In reply to Re: Is F back? posted by swlem3 on September 13, 2021
Well, he's booming in on the DJJ grabber at the moment.
I use a vert here so I can't tell. He was strong here on my RX at 1800 local EM83du.
Soon we may have the K5MO grabber going on 22M too. Another data point.
F is probably watching this board. As strong as his signal is, might be > 5 mW.
Oh well, gives us a sig to look for.....
Bob Re: Is F back?
EDJ
Posted by Ed Holland on September 14, 2021 at 00:13:28.
In reply to Re: Is F back? posted by WA1EDJ Bob on September 13, 2021
I'll go back over my screenshots from the weekend. If previous experience is any indication, F ought to make an appearance.
Re: Is F back?
Posted by WA1EDJ Bob on September 14, 2021 at 15:34:44.
In reply to Re: Is F back? posted by Ed Holland on September 14, 2021
Yesterday was the first I've seen of F in a while. He was solid copy in EM83du all last night until I switched antenna to TX.
Again today, he appeared at 1428 on DJJ grabber. Just like he flipped the TX switch!
Interesting.....
Bob Re: Is F back?
EDJ
EM83du
Posted by John Davis on September 14, 2021 at 16:12:42.
In reply to Re: Is F back? posted by WA1EDJ Bob on September 13, 2021
F is probably watching this board.
You've expressed something I have suspected for many months myself, Bob. It's the only reasonable explanation for why the beacon has undergone changes that have been suggested here, and it's why I have been dropping increasingly less subtle hints that F should abandon anonymity and join the community of active experimenters. I've been reporting this one every summer for years, and all the mysteriosity has worn a bit thin.
I wish Ray luck in using his loop to try to get a bearing, but it is likely to be difficult. Loops are great for DF when you have a direct wave signal with a single, fixed polarization. But my experience has been that small loops exhibit a null in one direction if the wave is vertically polarized and a totally different one if horizontally polarized, so skywaves--which almost invariably undergo cross-pol effects--sometimes exhibit no directional null at all, and other times the apparent null will shift all over the place.
(On the other hand, that trait has its advantages, too. It means you can minimize local noise sources pretty reliably, because their properties remain reasonably steady over moderate time intervals, yet still sometimes pull in DX that arrives by skywave from the same bearing as the noise, because the signal's apparent azimuth varies over a short to moderate time frame and is not necessarily subject to the same null.)
Oh well, gives us a sig to look for.....
You mean "look OUT for," don't you? :) ...as in the graphical road signs all over Georgia that indicate deer crossing areas. The image always suggested to me "dancing deer ahead," but of course actually means "watch out for giant beasts that go crashing around creating havoc willy-nilly." An apt metaphor for some mystery beacons.
Re: Is F back?
Posted by WA1EDJ Bob on September 14, 2021 at 17:50:28.
In reply to Re: Is F back? posted by John Davis on September 14, 2021
He also has a suspiciously strong signal. The most dominant signal on DJJ and similarly at my QTH in GA. Most signals are in and out. I suspect >5mW.
Bob F-Details
EDJ
Posted by F-Op on September 14, 2021 at 18:10:56.
In reply to Re: Is F back? posted by WA1EDJ Bob on September 14, 2021
Thank you very much for your Board's reports and patience over the last several months, unfortunately details of this beacon have been slow in forthcoming, for that I apologize.
Beacon F began intermittent operation 20 May 2020 as a 10 dBm, 10WPM CW transmitter to test the link with a NE US receiver.On or very close to 20 June 2020, F began for a short period non-coherent FSK keying testing. Between 15 July 2020 and 29 March
2021, the coherent, receiver-correlator and exciter assemblies were built an tested with a final configuration intermittently
on the air on and after 1 April, 2021.
Beacon-F Details:
Modulation Format: QRSS-6 (FSK6CW), 4.000 Hz shift, operating frequency and keying, GPS phase coherent
Operating frequency: 13555419 Hz
Transmitter Power Output: 10 milliwatts into 50 Ohms (resistive)
Antenna: Non-resonate dipole at 45 feet, fed with 52 feet of 450 Ohm ladder line
from an antenna matching network with 150 feet of RG213 between TX and matching
network. Total accumulated feed losses, no more than –3dB. Dipole is classic design
with end-end orientation E-W.
Elevation: 920 feet ASL
Location: Extreme west coast
Purpose: To explore and better understand the capabilities of very low power, long path, basic coherent communications.
Performance details of the transmissions and effects of path distortion are quantified through a remotely monitored/controlled low latency, GPS coherent receiver/correlator located in the NE portion of the US.
Thank you for your patience!!
Re: Is F back?
Posted by swlem3 on September 14, 2021 at 19:40:20.
In reply to Is F back? posted by WA1EDJ Bob on August 20, 2021
From F-op ... "Dipole is classic design with end-end orientation E-W".
That would seem to position the main lobes of signal from the dipole favoring transmission to the North and South of the West Coast. I assume if the dipole was rotated 90 degrees, I'd see a hefty increase in signal strength at my N. Central Texas location.
Ray
Re: More Freq shifting an oscillator
Posted by Pat Bunn on September 14, 2021 at 22:21:54.
In reply to More Freq shifting an oscillator posted by John K5MO on September 11, 2021
I have done a significant amount of experimenting with the Epson chip in both the DIP an CA smt package versions of the SG 8002. I am not at all satisfied with my results.
I use a 317L voltage regulator with two resistors in series from the ADJ pin to ground. I use a 240 ohm resistor from ADJ to OUT. Pretty much the recommended circuit.
on the two resistors to ground - the one closest to ground - has a 2N7002 switching FET across it. When the FET is turned on - the lower resistor is removed from the circuit causing a voltage change in the output of the regulator. Pretty simple and the voltage change is accurate down to the mV at switching. Much more accurate than I expected. In accurate, I mean that the voltage returns to the same level within a millivolt over a period of a few minutes observation.
The Epson chip, in either version does not change frequency in response to the voltage change. It is slow to respond and overshoots and tends to drift when the Vcc pin and enable pin see voltage changes. I find that the more the voltage changes, the more the frequency changes but also the more the Epson chip overshoots and drifts. It can be made to work with small voltage changes and seems to work better at a Vcc of 4.8 volts and a shift of.15 to .2 volts. with this voltage shift, the frequency change is a a Hertz or two.
In the past, I have run FSK beacons with the DIP SG 8002, with few problems. The chips don't seem to work the same as the ones from 10 years ago.
I find that a standard crystal oscillator does a much better job being modulated with a voltage modulator. I have one ugly constructed at 13.556 MHz, but it it too far away from the grabber to use. Custom crystal are out of the question due to cost. I received a quote of $100 for a crystal in the 22 Meter band.
Today, I ordered some PC Boards for a design using two Epson SG8002 DIP chips of the same frequency. One runs at a regulated 5.0 volts and the other with a variable voltage to change the frequency a few Hz from the one running at 5.0 volts. the two frequencies are not shifted, they free run at the same frequency. The feed a high isolation analog SPDT switch. They keying PIC processor operates the switch to key between the mark and space SG 8002s. The board will take a week or so. I will see how things work.
I will be at Edisto Island this weekend, and will shut down LCSC and replace it with another transmitter using the same circuit as the current USC or just take it off the air until a better solution can be found.
Synthesizer chips are probably the way to go, but I am not a C programmer and not sure I want to learn it at this point. I may give it a try by modifying some existing code.
Pat Re: More Freq shifting an oscillator
N4LTA
Posted by WA1EDJ Bob on September 14, 2021 at 23:41:20.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 14, 2021
Hey Pat. Thanks for the info.
There is some simple code out there to QRSS a Si5351a which is pretty standard these days and you can move freq easily. I've thought about it but just not motivated to try it.
I googled Si5351a QRSS and I think I found some code. It is all Arduino which is messy at times by lots of code out there to play with. My WSPR beacon is on an Arduino platform.
I'll look around. 5351a is the way to go these days for no xtal solutions.
I'll get back....
Bob Re: More Freq shifting an oscillator
EDJ
Posted by Pat Bunn on September 15, 2021 at 01:14:46.
In reply to Re: More Freq shifting an oscillator posted by WA1EDJ Bob on September 14, 2021
Thanks Bob
I have a Si5351a board. Also have several Arduino boards. Again - just finding the time to get into the programming.
Pat Re: More Freq shifting an oscillator
N4LTA
Posted by WA1EDJ Bob on September 15, 2021 at 13:23:59.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 15, 2021
I understand. If you don't do this every day, getting your brain wrapped around it takes a bit.
The 5351a hardware is pretty simple, just I2C control. I completely lift the code that is out there and hack it. That comes with it's own pitfalls too.
Let me look around and find some I saw that does QRSS. From there we can build around it. I'm sure someone has already done it.
Bob Re: More Freq shifting an oscillator
EDJ
Posted by WA1EDJ Bob on September 15, 2021 at 13:27:04.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 15, 2021
Here's a simple example. Of course, there's some init code to go with this.
Not elegant but simple.
http://wa6pzb.blogspot.com/2014/11/qrss-with-si5351.html
Re: More Freq shifting an oscillator
Posted by John K5MO on September 15, 2021 at 16:24:22.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 14, 2021
Hi Pat
I'm very much in the n00b phase of C programming too. The good news is there's a lot of libraries out there that have a lot of functionality. For the dual EPSON 8002, I might suggest this library:
https://www.arduino.cc/reference/en/libraries/cww-morse-transmit/
You can add this to the Arduino IDE and upon recent request, the author has added sub 1 WPM CW speed AND dual outputs so that you can key two separate oscillators if you wish. I've used this for a variety of beacons, etc. It has selectable high and low keying sense and a bunch of other handy features. I can send you example code as well if you ping me at my QRZ.com address.
More later....errand time
John
Re: More Freq shifting an oscillator
Posted by WA1EDJ Bob on September 15, 2021 at 17:06:45.
In reply to Re: More Freq shifting an oscillator posted by John K5MO on September 15, 2021
Thanks John!
Along this line, I've found some example code from Hans for his Arduino prototyping platform. It is simply an arduino Uno, 5351a synth board, area for a LPF and a few BS170 final amp transistors.
I use this same HW for my WSPR TX. Works like a charm.
Hans provided some sample code to do FSKCW QRSS. I loaded it into the IDE and it compiled no problem. I'll try to load it on a complete TX and see if it actually does what it says. If so, we have a Si5351a QRSS TX. All the circuitry can be changed and simplified to any Arduino or 5351a. I use the premade 5351a breakout boards and a arduino Pro Mini to make a very compact controller TX. So maybe I can give this a try. Let you know...
Bob Re: More Freq shifting an oscillator
EDJ
Posted by WA1EDJ Bob on September 15, 2021 at 17:07:44.
In reply to Re: More Freq shifting an oscillator posted by John K5MO on September 15, 2021
Oh, BTW, looks like the QCX should make it by this Sat.
I'm following tracking....
Bob
Re: More Freq shifting an oscillator
Posted by John K5MO on September 15, 2021 at 20:34:11.
In reply to Re: More Freq shifting an oscillator posted by WA1EDJ Bob on September 15, 2021
Great on both Bob.
I was not able to get the Epson to shift reliably without also shifting Vcc, however doing so resulted in what appears to be a very stable output with plenty of power out.
I'm anxious to see how your experiments with the freq synthesizer circuit goes too.
Where there's a will, there's multiple ways :-)
John
Re: More Freq shifting an oscillator
Posted by Pat Bunn on September 15, 2021 at 21:01:32.
In reply to Re: More Freq shifting an oscillator posted by John K5MO on September 15, 2021
I have LCSC set up and have it running now. It seems to be about as stable as the Epson chip gets - at least for me. I am shifting it.15 volts roughly with the low value right at 5.0 volts. It is all set up to take to Edisto Island tomorrow
Re: More Freq shifting an oscillator
Posted by Pat Bunn on September 15, 2021 at 21:05:44.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 15, 2021
Forgot to ak. Any reports on my test of the new LCSC especially a screen shot would be appreciated. It will move to the coast tomorrow. It looks decent here with ARGO and no antenna.
Thanks Re: More Freq shifting an oscillator
Pat
N4LTA
Posted by swlem3 on September 15, 2021 at 22:25:02.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 15, 2021
Pat...
www.dropbox.com/s/vtromf0lgsi9vb2/lcsc.jpg?dl=0
Ray
Re: More Freq shifting an oscillator
Posted by swlem3 on September 15, 2021 at 22:38:50.
In reply to Re: More Freq shifting an oscillator posted by swlem3 on September 15, 2021
a few minutes later...
www.dropbox.com/s/tss6lnxoxqbb0zu/lcsc2.jpg?dl=0
Ray
Re: More Freq shifting an oscillator
Posted by Pat Bunn on September 16, 2021 at 02:25:49.
In reply to Re: More Freq shifting an oscillator posted by swlem3 on September 15, 2021
Ray
Thanks. That is exactly what I was looking for.
The one below is operating from my QTH and will be installed at Edisto Island
tomorrow. The one above is the screwed up keying one, currently running at Edisto Island.
Thanks very much for your assistance.
Best 73
Pat
630 m propagation shift
Posted by swlem3 on September 16, 2021 at 14:25:19.
Guess we're slowly shifting into the fall type propagation on the medium frequencies. VK has been copied here in the mid Conus the past couple nights. I noted for the first time at this qth, VK2AN was decoded on 630m. Previously, in past seasons, only VK4YB has made it here from VK land.
2021-09-16 11:06 VK2AN 0.475727 -27 0 QF54cg 1 SWLEM3 EM03rf 2021-09-16 11:46 VK2AN 0.475727 -32 0 QF54cg 1 SWLEM3 EM03rf
Ray
Re: More Freq shifting an oscillator
Posted by WA1EDJ Bob on September 16, 2021 at 16:53:30.
In reply to Re: More Freq shifting an oscillator posted by John K5MO on September 15, 2021
I did find a suitable Arduino platform to test the 5351a FSKCW code on. Just a Arduino Nano (though any arduino should work) and a QRPLabs 5351a synth board.
Code loaded fine and from the looks of the keying LED it is working. A rough frequency check showed it was on 13.556 xxx MHz. This can be tweeked to be accurate by changing the Ref osc freq in the code. And the beauty is, you can move the freq anywhere you want.
I'll try to run it tonight and get an Argo screen shot.
Bob Re: 630 m propagation shift
EDJ
Posted by Garry, K3SIW on September 16, 2021 at 20:18:23.
In reply to 630 m propagation shift posted by swlem3 on September 16, 2021
Very impressive Ray. I've been monitoring wspr-2 on 136 kHz the last few days and WH2XND booms in around local sunrise if the lightning racket isn't too bad. The second weekend of the 10 GHz & Above contest is nearing but after that will move up to 630 mtrs to see what's making it to NE IL.
73, Garry, K3SIW, EN52ta, Elgin, IL
Re: 630 m propagation shift
Posted by swlem3 on September 16, 2021 at 20:35:34.
In reply to Re: 630 m propagation shift posted by Garry, K3SIW on September 16, 2021
Thanks Garry. Know what you mean about the racket on 2200m. It's been rather noisy lately. I've been decoding down there also and have noted the sunrise peaking of XND.
I think 630m is starting to ramp up. I'm starting to see the West coast stations more frequently, so by the time the contest is over, you'll probably see a fair improvement in 630m overnight from what it has been.
73, Re: More Freq shifting an oscillator
Ray
Posted by Pat Bunn on September 17, 2021 at 00:44:04.
In reply to Re: More Freq shifting an oscillator posted by WA1EDJ Bob on September 16, 2021
Thanks Bob. I have the QRP labs board in hand and several Arduinos including a Nano.
Look forward to giving it a try. I am at Edisto and will put a new transmitter on the air for LCSC.
Pat
Re: More Freq shifting an oscillator
Posted by Mike N8OOU on September 17, 2021 at 11:37:00.
In reply to Re: More Freq shifting an oscillator posted by WA1EDJ Bob on September 16, 2021
Bob,
Take a close look at your Argo captures. The example code may not make the best output. I ended up only using a few of the lower level functions to set the synth registers for the WM Lowfer.
Also check the spurious output levels of the Arduino and synth crystal freqs as well as the desired tramsmit frequency. It took some work to contain the "junk" inside the Lowfer exciter box. I'm still not fully happy in that area, but I meet the rules.
Mike 73
Re: More Freq shifting an oscillator
Posted by WA1EDJ Bob WA1EDJ on September 17, 2021 at 14:50:32.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 17, 2021
I did get it going last night. All worked for me. Mike, N800U did comment above on the output. I've attached an Argo screen shot of what my sign looked like. This is raw, unfiltered output of the 5351a synth board. It has a transition glitches but overall not bad. It can also be that I'm driving the RX hard with a very strong signal. I will take a closer look in a finished TX.
I used a Nano (easy to upload to) and a QRPLab 5351a synth.
I would add a BS170 amp. and LPF. That's exactally what is on my WSPR TX.
Of course, all this is included on the QRPLabs Arduino shield board. Just uses a Uno
for controller.
If you need any help with the arduino, let me know.
I'm still using 1.8.9 version portable on a USB stick. I works so I don't mess with the vession.
Bob Re: More Freq shifting an oscillator
EDJ
Posted by WA1EDJ Bob on September 17, 2021 at 14:51:33.
In reply to Re: More Freq shifting an oscillator posted by Pat Bunn on September 17, 2021
Well, I tried to attach a screen shot. Didn't work!
Bob Screen shot of 5351a QRSS TX
EDJ
Posted by WA1EDJ Bob WA1EDJ on September 17, 2021 at 14:52:31.
Let's try this....
EDJ SI5351a QRSS TX
Posted by Bob WA1EDJ on September 17, 2021 at 14:57:01.
Try this again!
---------------------------------------------------------------
File Attachment 1: EDJ5351a_TX.gif
Re: More Freq shifting an oscillator
I did see some glitches at what I would call the bit transitions on characters.
This was raw output from the 5351a synth board. No LPF yet or RF amp. I attributed it to the signal being so strong into the RX which was a foot away.
I use a similar TX, with full LPF and a BS170 final for my WSPR TX on 22M and it seems clean. I have not looked far and wide but at 5mW I would not think there would be a significant spurious output.
I'm not great a arduino code. I would be reluctant to play much with the 5351a routines. If you have some code to share, I'd take a look.
I've dug some pretty deep hole with some code that totally broke it!
Good to hear from you! I see WM pop up on the DJJ grabber from time to time!
Bob Re: More Freq shifting an oscillator
EDJ
EM83du
Posted by Pat Bunn on September 17, 2021 at 15:57:14.
In reply to Re: More Freq shifting an oscillator posted by WA1EDJ Bob on September 17, 2021
Looks pretty good Bob.
Pat
USC and LCSC
Posted by Pat Bunn on September 17, 2021 at 16:02:48.
Both LCSC and USC are now operating at their permanent locations. Both are new transmitters with (hopefully) better signals.
Any reports or screen shots would be appreciated.
Thanks
Pat USC and LCSC
N4LTA
Posted by Pat Bunn on September 17, 2021 at 16:02:49.
Both LCSC and USC are now operating at their permanent locations. Both are new transmitters with (hopefully) better signals.
Any reports or screen shots would be appreciated.
Thanks
Pat Re: EDJ SI5351a QRSS TX
N4LTA
Posted by John k5mo on September 17, 2021 at 21:21:51.
In reply to EDJ SI5351a QRSS TX posted by Bob WA1EDJ on September 17, 2021
That looks good Bob. I can see a little blip at the end of what looks like a standard "dit length". I'm sure that's a nice tidy bit of hardware too! Congrats.
Of course, Iv'e just spent a couple weeks fussing with HW/SW for the Epson implementation. Such is my normal sideways path. :-)
I think I've got the frequency delta tamed down a bit. I need to add a voltage regulator then hope to have it on the air tomorrow. Looks like I should probably switch to 3 second dit's too.
Adjusted down to QRSS levels, I've got it transmitting into a resistor for testing
www.qsl.net/k5mo
Re: EDJ SI5351a QRSS TX
Posted by WA1EDJ Bob on September 17, 2021 at 21:47:18.
In reply to Re: EDJ SI5351a QRSS TX posted by John k5mo on September 17, 2021
Sounds good John. I may try to package my stuff into a compact QRSS TX. It certainly works. The Epson solution works fine too. I've got one. Just not freq. agil.
I'll look for your new signal. Maybe I'll see the grabber fire up too.
You should see it soon.
Bob Si5351 clock generator
EDJ
Posted by Chris on September 18, 2021 at 17:23:08.
Hello all,
I found some code for a cw beacon . Assembled aurduino mini pro and a Si5351 clock generator together. I measured 5dbm from the Si5351 chip which is about a little over 3mw. Still need to build LPF for this. I will be use it as a cw hifer beacon and may put it up for testing in a few weeks. Interested to see how stable the Si5351 is and if a lot or little frequency drift happens.
Chris
Re: Si5351 clock generator
Posted by John K5MO on September 18, 2021 at 18:53:20.
In reply to Si5351 clock generator posted by Chris on September 18, 2021
Nice work Chris. Will be looking forward to seeing if I can log it.
John
22 m Hifer band grabber via Ottawa QRV - SATURDAY
Posted by Andy G0FTD on September 18, 2021 at 19:12:35.
My remote grabber is currently active from approx 1900 UTC - 2300 UTC.
https://qsl.net/g0ftd/grabber.htm
73 de Andy
Re: evening wspr2 hifer
Posted by swlem3 on September 20, 2021 at 01:32:59.
In reply to evening wspr2 hifer posted by swlem3 on September 03, 2021
Not too many hifer wspr2's to report today. Propagation was much better yesterday with more decodes and better signals. Still managed to rx a decode of WB8ELK though.
1528 -29 1.8 13.555403 0 KA9SZX EN40 7 1054 1600 -24 -0.0 13.555400 0 K3SIW EN52 7 1330 1610 -21 0.1 13.555400 0 K3SIW EN52 7 1330 1620 -24 -0.1 13.555400 0 K3SIW EN52 7 1330 1650 -29 -0.0 13.555398 0 K3SIW EN52 7 1330 1720 -29 0.1 13.555400 0 K3SIW EN52 7 1330 2020 -28 -0.0 13.555399 0 K3SIW EN52 7 1330 2330 -21 -0.1 13.555401 0 K3SIW EN52 7 1330 2340 -15 -0.1 13.555400 0 K3SIW EN52 7 1330 2350 -19 -0.1 13.555399 0 K3SIW EN52 7 1330 0000 -13 -0.1 13.555399 0 K3SIW EN52 7 1330 0008 -23 1.6 13.555405 0 KA9SZX EN40 7 1054 0008 -28 1.6 13.555416 0 WB8ELK EM64 7 1081 0010 -22 0.1 13.555400 0 K3SIW EN52 7 1330 0020 -24 -0.1 13.555399 0 K3SIW EN52 7 1330 0030 -18 0.1 13.555399 0 K3SIW EN52 7 1330 0040 -15 0.0 13.555401 0 K3SIW EN52 7 1330 0050 -17 -0.0 13.555399 0 K3SIW EN52 7 1330 0100 -25 -1.8 13.555337 0 VA3ROM EN58 7 1877 0112 -27 -0.4 13.555385 0 WA1EDJ EM83 7 1449
Ray ... N. Central Texas
Re: evening wspr2 hifer
Posted by Ed Holland on September 20, 2021 at 03:55:32.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 20, 2021
Not too bad here for WSPR catches over the weekend:
22m WSPR 18 September
2158 -27 2.9 13.561536 0 WB8ELK EM64 7 3266
2228 -28 2.8 13.561536 0 WB8ELK EM64 7 3266
2248 -27 3.0 13.561536 0 WB8ELK EM64 7 3266
2300 -21 -0.3 13.561520 0 K3SIW EN52 7 2962
2308 -26 2.8 13.561536 0 WB8ELK EM64 7 3266
2310 -27 0.4 13.561520 0 K3SIW EN52 7 2962
2328 -27 2.8 13.561536 0 WB8ELK EM64 7 3266
2348 -29 0.7 13.561507 0 WA1EDJ EM83 7 3652
0008 -27 0.1 13.561506 -1 WA1EDJ EM83 7 3652
0028 -29 0.9 13.561507 0 WA1EDJ EM83 7 3652
0028 -27 3.1 13.561536 0 WB8ELK EM64 7 3266
0048 -22 2.8 13.561536 0 WB8ELK EM64 7 3266
0140 -26 1.6 13.561520 -2 K3SIW EN52 7 2962
0148 -28 3.1 13.561527 0 KA9SZX
22M WSPR 19 September
2228 -25 2.9 13.561490 2 WB8ELK EM64 7 3266 Re: evening wspr2 hifer
2248 -23 2.8 13.561506 1 WB8ELK EM64 7 3266
2252 -29 -1.7 13.561478 0 WA1EDJ EM83 7 3652
2308 -27 2.8 13.561516 0 WB8ELK EM64 7 3266
2328 -23 3.0 13.561522 0 WB8ELK EM64 7 3266
2340 -28 0.7 13.561495 0 WA1EDJ EM83 7 3652
2340 -21 1.3 13.561507 0 K3SIW EN52 7 2962
2348 -20 2.9 13.561524 0 WB8ELK EM64 7 3266
2350 -21 1.3 13.561507 0 K3SIW EN52 7 2962
0000 -18 0.4 13.561507 0 K3SIW EN52 7 2962
0010 -18 -4.2 13.561509 0 K3SIW EN52 7 2962
0020 -17 1.1 13.561507 0 K3SIW EN52 7 2962
0030 -18 0.7 13.561507 0 K3SIW EN52 7 2962
0040 -22 0.8 13.561509 0 K3SIW EN52 7 2962
0044 -29 0.1 13.561496 0 WA1EDJ EM83 7 3652
0050 -25 0.9 13.561507 0 K3SIW EN52 7 2962
0104 -28 0.9 13.561496 0 WA1EDJ EM83 7 3652
0108 -21 3.1 13.561525 0 WB8ELK EM64 7 3266
0116 -27 0.9 13.561495 -1 WA1EDJ EM83 7 3652
0210 -23 1.4 13.561508 0 K3SIW EN52 7 2962
Posted by WA1EDJ Bob on September 20, 2021 at 13:22:10.
In reply to Re: evening wspr2 hifer posted by Ed Holland on September 20, 2021
TNX Ed!
Good to see some decodes from your end. I made a change last week that reduced power significantly and have noticed fewer decodes. Still got it though!
TNX! Re: Si5351 clock generator
Bob
EDJ
EM83du
Posted by WA1EDJ Bob on September 20, 2021 at 13:25:06.
In reply to Si5351 clock generator posted by Chris on September 18, 2021
Chris,
Could you point me to the code you found? Is this code FSKCW? I'm putting together
a QRSS FSKCW TX based on the QRPLabs Arduino shield board myself. Using Hans example code. I've tried it and it seems to work.
TNX! Re: Si5351 clock generator
Bob
EDJ
EM83du
Posted by Chris on September 20, 2021 at 15:50:29.
In reply to Re: Si5351 clock generator posted by WA1EDJ Bob on September 20, 2021
Hey Bob,
Looks to be just cw . I put together using code and make a few changes and works on test bench.
I put this in YouTube search” Automatic Programmable CW Beacon 4kHz to 225 MHz with Arduino & Si5351”
Code is in Macedonian but can be translated as what I did.
Maybe you can look over code. I am not much of a programmer myself.
Chris “Abby beacon”
Re: Si5351 clock generator
Posted by John K5MO on September 20, 2021 at 23:45:38.
In reply to Re: Si5351 clock generator posted by WA1EDJ Bob on September 20, 2021
Looks like you could stitch together "E's" and "T's" with a frequency shift between the two using that program.) Klunky, but would likely work though not as elegant as Hans's code :-) Fortunately we're not keying things rapidly. I'll give this a shot.
John the Barbarian
Re: evening wspr2 hifer
Posted by swlem3 on September 21, 2021 at 01:00:11.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 20, 2021
All K3SIW today ... and not many decodes. Sept. 20, 2021
1510 -27 0.3 13.555386 0 K3SIW EN52 7 1330 1520 -25 0.4 13.555387 0 K3SIW EN52 7 1330 1530 -26 0.4 13.555385 0 K3SIW EN52 7 1330 1540 -23 0.4 13.555387 0 K3SIW EN52 7 1330 1550 -23 0.3 13.555386 0 K3SIW EN52 7 1330 1600 -27 0.4 13.555388 0 K3SIW EN52 7 1330 1610 -27 0.3 13.555386 0 K3SIW EN52 7 1330 1620 -24 0.2 13.555387 0 K3SIW EN52 7 1330 1820 -28 0.1 13.555387 0 K3SIW EN52 7 1330 1850 -27 0.2 13.555387 0 K3SIW EN52 7 1330 2020 -28 -0.0 13.555386 0 K3SIW EN52 7 1330 2040 -32 0.2 13.555386 0 K3SIW EN52 7 1330 2300 -25 0.2 13.555386 -1 K3SIW EN52 7 1330 2310 -27 0.1 13.555386 0 K3SIW EN52 7 1330 2320 -27 0.2 13.555387 0 K3SIW EN52 7 1330 2330 -18 0.2 13.555386 0 K3SIW EN52 7 1330 2340 -17 0.1 13.555388 0 K3SIW EN52 7 1330 2350 -19 0.2 13.555384 0 K3SIW EN52 7 1330 0000 -19 0.1 13.555387 0 K3SIW EN52 7 1330 0010 -22 0.1 13.555385 0 K3SIW EN52 7 1330 0020 -19 -0.1 13.555387 0 K3SIW EN52 7 1330 0030 -18 0.1 13.555385 0 K3SIW EN52 7 1330 0040 -22 0.0 13.555386 0 K3SIW EN52 7 1330
Ray
End of medium and long waves for the Czech public broadcaster
Posted by Mike Terry on September 21, 2021 at 11:50:24.
Since the beginning of this month, Český rozhlas Dvojka has been broadcasting information about their closure on medium wave.
At the end of this year, Český rozhlas will cease broadcasting on medium wave and long wave.
On this occasion, a warning begins to be broadcast on the AM transmitters of Dvojka radio. It aims to prepare the auditor for this stage. Listeners on Dvojka’s AM frequencies are alerted by a message announcing that the broadcast will end on December 31, 2021.
In the weeks and months to come, Czech Radio will intensify this broadcasting.
Broadcasting in the AM range was very expensive for Czech radio. The director general of the public establishment René Zavoral has confirmed on several occasions that this distribution is of the order of tens of millions of crowns per year.
Dvojka and other Czech radio stations are broadcast in the ČRo DAB + multiplex, on FM and online.
The above text was Google-translated from the original text in French:
Fin des ondes moyennes et longues pour le radiodiffuseur public de Tchéquie.Depuis le début de ce mois, Český rozhlas Dvojka diffuse des informations sur leur fermeture sur les ondes moyennes.À la fin de cette année, la Český rozhlas cessera de diffuser sur les ondes moyennes et les ondes longues
.A cette occasion, un avertissement commence à être diffusé sur les émetteurs en modulation d’amplitude de la radio Dvojka. Il vise à préparer l’auditeur à cette étape. Les auditeurs sur les fréquences AM de Dvojka sont alertés par un message annonçant que la diffusion se terminera le 31 décembre 2021.
Dans les semaines et les mois à venir, la Radio tchèque intensifiera cette diffusion.La diffusion dans la gamme AM était très chère pour la radio tchèque. Le directeur général de l’établissement public René Zavoral a confirmé à plusieurs reprises que cette distribution est de l’ordre de dizaines de millions de couronnes par an.
Dvojka, ainsi que d’autres stations de radio tchèques sont diffusées dans le multiplex ČRo DAB +, en FM et en ligne.
Radios du Monde fb group (2021-09-12) and Svenn Martinsen (2021-09-21) (via https://mediumwave.info/news)
WB8ELK now on 13555370
Posted by Bill WB8ELK on September 21, 2021 at 19:12:50.
Since USC came up on 13.555418 which was right on top of where I was testing, I moved down to 13.555370 MHz since it is easy for me to move my board around in frequency. It was getting crowded up there between 400 and 425 so this is probably where I will stay testing for awhile. Pat N4LTA, I see USC on several remote SDR radios with good signals. - Bill WB8ELK
Re: WB8ELK now on 13555370
Posted by Pat Bunn on September 21, 2021 at 23:09:47.
In reply to WB8ELK now on 13555370 posted by Bill WB8ELK on September 21, 2021
Bill,
Sorry if I came up on top of you. These Epsom chips are 100ppm and you can't tell where they end up.. I have some extra chips and can move if I need to.
Pat Re: WB8ELK now on 13555370
N4LTA
Posted by Bill Brown on September 22, 2021 at 00:25:16.
In reply to Re: WB8ELK now on 13555370 posted by Pat Bunn on September 21, 2021
No worries Pat, it is fine where it is....I just moved down to 13.555370 since it is less crowded there anyways. - Bill WB8ELK Re: WB8ELK now on 13555370
Posted by Bill Brown on September 22, 2021 at 00:27:16.
In reply to Re: WB8ELK now on 13555370 posted by Pat Bunn on September 21, 2021
No problem Pat, you are fine where you are. I was going to move down in frequency anyways since it is less crowded there. - Bill WB8ELK
Re: evening wspr2 hifer
Posted by swlem3 on September 22, 2021 at 01:19:48.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 20, 2021
Did a little bit better today Sept. 21, 2021 w/ hifer wspr2 decodes. Still mostly SIW, but had just a few others too. SIW has been generating some nice signal levels here, as you can see.
1450 -20 0.1 13.555400 0 K3SIW EN52 7 1330 1500 -16 0.1 13.555400 0 K3SIW EN52 7 1330 1510 -20 0.1 13.555398 0 K3SIW EN52 7 1330 1520 -20 0.2 13.555399 0 K3SIW EN52 7 1330 1530 -19 0.1 13.555399 0 K3SIW EN52 7 1330 1540 -26 0.0 13.555398 0 K3SIW EN52 7 1330 1550 -16 0.1 13.555398 0 K3SIW EN52 7 1330 1600 -19 0.0 13.555400 0 K3SIW EN52 7 1330 1610 -24 0.1 13.555400 0 K3SIW EN52 7 1330 1620 -20 0.0 13.555401 0 K3SIW EN52 7 1330 1630 -24 -0.0 13.555401 0 K3SIW EN52 7 1330 1640 -17 0.1 13.555401 0 K3SIW EN52 7 1330 1648 -29 -0.7 13.555388 0 WA1EDJ EM83 7 1449 1650 -16 0.0 13.555401 0 K3SIW EN52 7 1330 1700 -15 0.1 13.555399 0 K3SIW EN52 7 1330 1710 -16 0.2 13.555400 0 K3SIW EN52 7 1330 1800 -26 -0.0 13.555401 0 K3SIW EN52 7 1330 1830 -29 0.1 13.555399 0 K3SIW EN52 7 1330 1940 -27 0.1 13.555399 0 K3SIW EN52 7 1330 1950 -25 -0.1 13.555401 0 K3SIW EN52 7 1330 2000 -9 -0.1 13.555401 0 K3SIW EN52 7 1330 2010 -14 -0.1 13.555399 0 K3SIW EN52 7 1330 2020 -18 -0.0 13.555399 0 K3SIW EN52 7 1330 2030 -18 -0.1 13.555401 0 K3SIW EN52 7 1330 2040 -20 -0.0 13.555401 0 K3SIW EN52 7 1330 2050 -21 -0.0 13.555401 0 K3SIW EN52 7 1330 2100 -19 -0.1 13.555401 0 K3SIW EN52 7 1330 2110 -18 -0.1 13.555401 0 K3SIW EN52 7 1330 2120 -16 -0.1 13.555401 0 K3SIW EN52 7 1330 2130 -15 -0.1 13.555400 0 K3SIW EN52 7 1330 2140 -13 -0.0 13.555398 0 K3SIW EN52 7 1330 2148 -26 1.8 13.555369 0 WB8ELK EM64 7 1081 2150 -11 -0.0 13.555399 0 K3SIW EN52 7 1330 2200 -10 -0.1 13.555400 0 K3SIW EN52 7 1330 2210 -28 -1.3 13.555341 0 VA3ROM EN58 7 1877 2210 -23 -0.1 13.555400 0 K3SIW EN52 7 1330 2220 -16 -0.1 13.555401 0 K3SIW EN52 7 1330 2230 -15 -0.0 13.555399 0 K3SIW EN52 7 1330 2240 -14 -0.1 13.555398 0 K3SIW EN52 7 1330 2250 -17 0.1 13.555398 0 K3SIW EN52 7 1330 2300 -16 -0.0 13.555398 0 K3SIW EN52 7 1330 2310 -14 0.0 13.555400 0 K3SIW EN52 7 1330 2320 -16 0.0 13.555398 0 K3SIW EN52 7 1330 2330 -16 -0.1 13.555397 0 K3SIW EN52 7 1330 2340 -16 -0.0 13.555400 0 K3SIW EN52 7 1330 2348 -27 1.7 13.555370 0 WB8ELK EM64 7 1081 2350 -17 0.0 13.555399 0 K3SIW EN52 7 1330 0000 -18 -0.1 13.555399 0 K3SIW EN52 7 1330 0010 -17 -0.1 13.555396 0 K3SIW EN52 7 1330 0020 -10 -0.1 13.555398 0 K3SIW EN52 7 1330 0030 -18 -0.1 13.555399 0 K3SIW EN52 7 1330 0040 -16 -0.1 13.555400 0 K3SIW EN52 7 1330 0050 -19 -0.1 13.555397 0 K3SIW EN52 7 1330
Ray ... N. Central Texas
Re: evening wspr2 hifer
Posted by WA1EDJ Bob on September 22, 2021 at 13:16:55.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 22, 2021
Thanks Ray!
At least I got 1 decode!
Been quiet here in EM83du. EH seems to be gone. Have not seen any EH for a couple of weeks.
SIW and ROM are still pretty much nightly here in GA.
Keep up the good work!
Bob Re: evening wspr2 hifer
EDJ
EM83du
Posted by swlem3 on September 23, 2021 at 04:30:13.
In reply to Re: evening wspr2 hifer posted by WA1EDJ Bob on September 22, 2021
Bob, ok on not seeing EH for awhile. I haven't been looking at Argo lately... just running the wspr2 program during the day unattended. I've been pretty busy, so I just figured I'd let the wsjtx program run and upload the decodes to wsprnet. Guess evening propagation has been improving for you to copy SIW and ROM nightly.
Ray
Re: evening wspr2 hifer
Posted by WA1EDJ Bob on September 23, 2021 at 16:32:17.
In reply to Re: evening wspr2 hifer posted by swlem3 on September 23, 2021
SIW and ROM have been regulars for quite some time. EH is usually there too. I could count on EH at some point in a day. I seem to have favorable N/S path here in EM83du.
When RY returns he will be there daily too. What was strange is when F was around,
very strong and daily visits.
TNX for reports!
Bob Lowfer SIW QRV
EDJ
Posted by Garry, K3SIW on September 24, 2021 at 01:14:09.
Lowfer SIW is back on the air, at least at the moment. Had a problem firing up in that the K1EL keyer apparently was randomly dropping back to command mode. Bob, NK9M, in EN51uq where the beacon is located tried starting up with MSG2 instead of MSG1/CMD and that seems to be working. The schedule is like last year: M,W,F on 185.185 kHz sending wspr15, opera32, visual "SIW", then repeat and T,TH,Sa,Su on 185.2993 kHz sending "SIW" at QRSS60, then QRSS30, then repeat. Switchover time is 1800Z.
73, Garry, K3SIW, EN52ta, Elgin, IL
Re: Lowfer SIW QRV
Posted by John Davis on September 24, 2021 at 05:49:42.
In reply to Lowfer SIW QRV posted by Garry, K3SIW on September 24, 2021
A-ha! While looking tonight for a maybe-repeat of my WM reception two weeks ago, I was not rewarded with WM but did catch something that looked like a possible intruder just under 185.2995. Didn't pay attention because I wasn't expecting to see anyone there, though, so I'll need to look again in the morning when QRN may be a tad less.
John
New EDJ QRSS TX QRV
Posted by WA1EDJ Bob on September 25, 2021 at 17:06:53.
Got the Si5351a TX from QRPLabs going.
13.555 390 pretty close, measured with good counter. QRPLabs synth board with TCXO.
UNO as controller.
FSKCW 3
Signing EDJ
Will be running FSKCW instead of WSPR for a while.
Give a listen! PSE,
Bob
EDJ
EM83du
SIW slant mode bifurcation
Posted by swlem3 on September 25, 2021 at 23:56:15.
Thought I'd grab another screenshot of SIW in the slant mode today. SIW did well down this way, both on QRSS as well as wspr2 mode. Noticed the bifurcation of the trace.
www.dropbox.com/s/cadj82tr1d5eah6/siw_bi.jpg?dl=0
Poland 225 kHz - off for maintenance
Ray ... N. Central Texas ... Elad FDM-S2 w/ random wire vertical
Posted by Mike Terry on September 26, 2021 at 07:07:40.
The Polish Radio Programme 1 longwave transmitter on 225 kHz located in Solec Kujawski will be switched off for maintenance from September 27, 06:10 UTC to October 10, 17:00 UTC. 25th & 26th Sept. HiFERs
(Wojtek Zaremba, Legionowo, Poland on the Hard-Core-DX mailing list)
Posted by Ed Holland on September 27, 2021 at 02:43:30.
Hi Folks,
Reception here in CA was mixed over the last couple of days. On 25th, Patchy copies of SIW (both the FSK and WSPR) were received. At last, I have a positive ID from the revived USC, which yielded a readable trace in Spectrum Lab around 14:45 PDT. NC Faded in and out with some consistency during the day. An hour later, approxmately 7 traces were all just unreadable in the 13,555.200 to 13,555.700 slice of spectrum under moitoring. A touch frustrating, but offering some hope for the future. THe band appeared to close down shortly after 19:30 local time.
It awoke around 06:15 local time with a very feint but definite sign of NC. Around 7, SIW was back with strength, as was a vist from WM.Shortly after this, conditions seemed to degrade and fell quite short of the previous day.
73's
Ed
Re: 136.450 kHz beacon 2200 meters update
Posted by Lee on September 28, 2021 at 18:12:26.
In reply to 136.450 kHz beacon 2200 meters update posted by Lee on September 03, 2021
Looks like the solar project won’t be finished until the end of October.
EDJ QRV QRSS6
Posted by WA1EDJ Bob on September 28, 2021 at 22:36:22.
I've dropped freq down to 13.555 380 and gone QRSS6 to stand out a bit more.
It's the new QRPLabs Arduino shield with 5351a synth board with TCXO.
I am seeing it on the DJJ HiFER1 grabber faintly currently.
Keep an eye out for me!
Bob UK - MSF 60 kHz
EDJ
EM83du
Posted by Mike Terry on September 29, 2021 at 14:20:10.
The MSF radio signal is a dedicated standard-frequency and time broadcast that provides an accurate and reliable source of UK civil time. It is available 24 hours a day across the whole of the UK and beyond. The signal operates on a frequency of 60 kHz and carries a time and date code that can be received and decoded by a wide range of readily-available radio-controlled clocks.
The MSF signal is transmitted from Anthorn Radio Station in Cumbria by Babcock International, under contract to NPL. The signal covers the whole of the UK, and can also be received throughout most of northern and western Europe. It is monitored against the national time scale UTC(NPL) and corrected when necessary, ensuring that the transmitted time is always correct.
https://www.npl.co.uk/msf-signal
(I have various clocks that rely on this free service - Mike)
Re: UK - MSF 60 kHz
Posted by Ed Holland on September 29, 2021 at 21:05:21.
In reply to UK - MSF 60 kHz posted by Mike Terry on September 29, 2021
Thanks for posting this little reminder of home!
I've copied MSF a few times, and have some clocks in the UK that rely on it.
The time and date encoding seems to be universal, as a Casio wristwatch I own is able to synchronise on either the WWV (US) or MSF (UK) signals at 60 kHz.
Ed
potrzebie