Re: 475Khz homebrewing
Posted by Tweeker on June 06, 2017 at 03:23:24.
In reply to
WH2XND
Posted by John Davis on June 07, 2017 at 01:34:09.
It was finally just barely dry enough to return to the farm today after the weekend's storms. With an entire week of dry weather forecast here, I've been hopeful of doing another 24 hour session with WH2XND, or else a day and evening of HiFERs followed by some late night attempts at EAR for my collection. (Immersed in formaldehyde than pinned in a display case; not mounted on a necklace.) The determining factor, of course, was to be the weather in neighboring states and the resulting QRN levels.
I took a preliminary look at 22 m and very little seemed to be going on there, but switching to 2200 m produced immediate results. Despite the signal being I didn't really need to start capturing XND for purposes of my project until closer to local solar noon here, so I took another look at 22 m and discovered there was now an opening to Illinois. As local solar noon approached (approx. 1:15 PM CDT) that opening dwindled, so I returned to 2200 meters. The results were: ALL_WSPR.TXT confirmed my perception that the last few decodes were taking longer and longer. The final successful decode was the signal at the middle of the other attached file, 06juna22.jpg. I continued to watch for another hour or more, during which time the QRN increased to a constant S9 plus occasional peaks, thanks to severe storms developing in eastern CO and in NM. At that level, the PLCs disappeared into the background and there was almost no sign of the WSPR signal at all on Argo. No 24 hour XND session today! Maybe something interesting will show up at HF this evening. John --------------------------------------------------------------- WH2XND @ VE3EAR
0548 -29 -0.9 0.137528 0 WH2XND DM33 40 73, J.B., VE3EAR Re: WH2XND
Per Tuesday evening's post, I continued to watch HF until a little before midnight, then tuned back down to 2200 meters where I soon had decodes of XND, gradually improving in quality. The PLCs were still swamped under S9+10 and greater noise, but the WSPR signal itself was now coming in at nighttime levels. It continued to decode most of the night; and beginning about 2 hours before sunrise the QRN gradually began to decrease, as evidenced by a gradual reappearance of the semi-local PLCs at 137.5 and 137.6 kHz. The WSPR signal took a serious dip in level for one transmission about an hour and 40 minutes before sunrise, then returned like gangbusters. There was another dip for about half an hour at mid-morning, but most slots still decoded. I uploaded spots to WSPRnet late Wednesday morning. From the daytime QRN levels, I was hopeful that the severe weather would not return Wednesday afternoon and evening, but it did--and from nearly the same locations in WY, CO, western KS, down into NM. By 4 PM CST, static was swamping the PLCs and seriously impairing the WSPR signal too. The 2104 UTC (4:04 PM CDT) time slot was the last one to decode for the afternoon. I then went to 22 m for several hours, periodically checking 2200 m for a return, but it was no go. By 10 PM, even 22 m was dead except for codar and ionosondes. Just two before 11:00, I did manage to hear FRC through the pulsed racket for several minutes...the first time in several sessions. After that, I considered shutting down and getting a decent night's sleep for the first time in a few days, but first I tuned down to 2200 m for one last look. I thought I could see faint traces of WSPR, so I just parked there and watched it get a little stronger with each passing time slot. At the 11:12 time slot (0412 UTC), it finally began to decode, so I let it run another hour with nicer decodes nearly every time around (see below). After the 0516 time slot, I realized I had what I'd been trying for: a 24 hour span of (near) continuous monitoring of XND. Like the night before, it had a reception gap of 7 out of the 24 hours, but this time it was solely because of the severe storm QRN, as I had been keeping an eye for the signal's post-sunset return. So, in the end, I did shut down for tonight. There is some hope of at least one night, perhaps two, with no nighttime severe storms within several hundred miles this weekend. If that comes about, perhaps I'll finally get my full 24 hours of copy as I did last year with more nearly normal QRN. Maybe I'll finally be able to get my EAR for June as well. Here's the final copy from tonight: John
EXP-1750 assembly manual
Hi Re: EXP-1750 assembly manual
Are you aware that Dave has a WEB site. He is selling replacement filters for failed Collins mechanical filters. You could e-mail him there. KE6PCT Lee
Re: WH2XND (Thursday)
The last post wrapped up with the conclusion of over 24 hours of near-continuous monitoring of XND at 12:16 AM Wednesday night/Thursday morning (0516 UTC), and I thought that might be the end of it for a while. Turns out not to be so. Finding myself with nothing better to do Thursday afternoon, I began watching again at 2 PM CDT/1900 UTC. I soon noticed that the QRN increase from severe weather a few hundred miles away did not set in as early and was not as bad as the previous couple of days. I was intrigued, and hoped it might be possible to distinguish between the typical pre-sunset fading and the QRN-induced loss of signal. Long story short, I now have (and uploaded to WSPRnet over the course of the day) a full, truly continuous 24 hour monitoring session of WH2XND. The only interruptions were four brief instances during non-transmitting intervals when I switched to WWV to keep the computer clock accurate. The first missing decode of Wednesday evening was the 5:24 PN/2224 UTC slot. The signal returned once more in the 2228 slot, then was gone entirely until 0328 UTC 9 June UTC/10:28 PM June 8 CDT. There were no further prolonged outages for the remainder of the 24 hours...only a few intermittently missing decodes during the 0900 hour (4-5 AM, from 2 hours to 1 hour pre-sunrise in KS). During that time, QRN was decreasing significantly, but from the ALL_WSPR.TXT file, it's clear the signal itself was fading at strategic times during several transmission slots, causing prolonged decode attempts. When I wrapped up at 1900 today (Friday) I went ahead and continued the session under a new name, just to see if today's weather might be any more conducive to distinguishing fades from QRN. Sure enough, the bad storms were farther away and not as extensive. As it turned out, the WSPR was fading away before the really dramatic increases in static density, and before the noise began obscuring the semi-local PLCs. I don't know whether I'll continue the session all night tonight or not. Busy weekend ahead, but it may be worth having further confirmation of the results I've gotten so far. John
Re: WH2XND (Friday)
The latest 24 hour continuous session sctually ran over by more than an hour, which is fine. It began at 2 PM CDT Friday and I changed over to a new session after 3 PM today. The upcoming one probably won't be 24 hours...it'll probably only be long enough to see if tonight's pre-sunset outage is any longer or shorter than the one last night. That one had one missed decode of the 2228 slot, then one more decode at 2232, then nothing further until 0012. Another miss at 0016, but thereafter, things got better and better. (See the database at WSPRnet.) This morning's sunrise fade was relatively mild. The QRN faded out almost as fast as the signal did at the approach of daylight. I need to re-count to be sure, but I don't think there were any missed spots at all this morning. The indicated SNRr degraded from -2 dB at 1108 UTC to -19 dB by 1128 (sunrise was at 6:00 AM/1100 UTC). It continued to sag over the next hour-plus, reaching -26 for three consecutive decodes centered on 1232 UTC before gradually improving to typical daytime levels in the -17 to -20 range. This differs from the prior two nights in that there was no complete outage, and the minimum occurred in the hour following sunrise, not the hour before. As I say, I don't plan to watch WH2XND all night tonight. I have other targets in mind for later unless something unexpected happens with XND during the early evening. That's possible, since there doesn't seem to be severe weather anywhere over the continent at the moment.
Allouis 162 kHz update
A Fuzzy Pair of EARs
When I concluded my 58+ hour marathon of WH2XND monitoring just after midnight last night, there were a few severe thunderstorms in South Dakota that appeared to be winding down, and the static was no longer a continuous S9+ roar. I hoped that meant there would be a further diminution of noise before daybreak, so I thought I'd try for my June capture of EAR. Well, the storms did not continue to diminish, but decided to develop further and stomp into Minnesota by daybreak. As a result, there was only a 30 minute window with any reception of EAR last night, and just barely at that. I did manage to run both a QRSS30 and 60 session simultaneously, both of which are included in the attached image. John
--------------------------------------------------------------- Re: A Fuzzy Pair of EARs
Thanks for the report and Argo snips John. The squirrel on the treadmill is running slower in this heat. 73, J.B., VE3EAR Re: EXP-1750 assembly manual
Putting "Dave Curry EXP 1750 LW Tranciever kit" into Google gives your the PDF download location. Hope this helps!
Any Successful Restricted Space 1750M Antenna Designs?
Heya! Re: EXP-1750 assembly manual
Thanks Lee and Gregg! Re: Any Successful Restricted Space 1750M Antenna Designs?
Sorry, Gregg, but within the constraints you mentioned, the answer is no. Even a loop has to have a certain amount of enclosed area times number of turns to work, and some sort of support. (And, a loop of adequate dimensions is pretty well ruled out by Industry Canada's very explicit formulae for computing acceptable sizes.) Any other antenna in such a space will undoubtedly be surrounded by too many obstructions that will interact with the strong incidental electric field of the antenna. One of the telescoping 43-foot all band HF antennas on the market could be used without guying, and just might clear some obstructions by a few feet, but still amounts to a pole sticking into the sky so far as nervous neighbors will be concerned.
Re: EXP-1750 assembly manual
That's the same result I've gotten every time as well. Dave's CW-893 transceiver article from QST in 1994 is online (illegally, courtesy of the Dread Pirate Ben PE2BZ, along with yet more LWCA copyrighted material too) but as I recall, it's not the same thing as the EXP1750. If anyone comes up with the manual and obtains Dave's blessing, we could host it on this site.
K6FRC - Strong Today
I haven't posted here in quite a while, but I had to mention how strongly K6FRC was copied today down here in Victorville, Southern CA. 579 at times with QSB, then faded out completely. Amazing copy. Interesting conditions today, at about 2pm Pacific Time. / Jack
Re: K6FRC - Strong Today
Thanks for posting that interesting report, Jack. It appears your reception coincided with a small but moderately long duration solar x-ray event. It brings to mind an event witnessed by W1TAG and myself back in April. documented in the thread "Hifers Tuesday Afternoon" beginning at: lwca.org/mbarchiv/msg0417.htm#6870 . Apparently, such events sometimes have beneficial effects on 22 meter propagation... at least, if the sun is somewhat westward of the observer's location at the time.
PVC operations
Hi Folks, Alas I have not been very active lately due to other commitments. For the time being PVC is operating on the original sloped dipole, but I will make further tests of the Hi Q loop aerial next month. I want to use the loop for RX and TX to compare against my baseline aerials, and hopefully collect some useful data as the season improves again. Although PVC seems to struggle except for Bill's reports from Colorado, reception here offers a lot of catches from many regions of the US. Is this a West to East propagation thing? With signals out there, I want to understand what can be done with limited size gear, and what constitutes good implementations of it. Cheers and 73s, Ed Limited Space Antenna Suggestions
Ref: LWCA Message Board postings #6984 and #6986 Gregg – I get the impression that your QTH is in Canada. I am not at all acquainted with Industry Canada rules. So I will write my comments as if you are located in the USA and you qualify for a US radio license. My suggestions: (1) If you are not already, become at least General Class Amateur Radio operator. (2) If by that time the US Amateur rules are not formally promulgated for 630 and 2200 meter operation, apply for a 47CFR5 Experimental License for frequency assignments in the 630 and 600 meter bands. (3) “Any antenna is better than no antenna and lamenting your loss by not participating.” I keep recalling back in the late 1970’s a WW1 (yes World War One) ex-military spark I used to chat with on 40 CW. He was on in years and had to sell his home which had a modest antenna farm on the property. He was now living in an apartment building, fortunately on the ground floor. Just outside a window was his reserved parking spot where he parked his VW Beetle. The car had a rear bumper mounted Hustler antenna base where he would mount one of his HF whips – 40, 20, 15 or 10 meters. He was permitted to run a RG-58 coax cable out of the window, follow an expansion slot in the sidewalk, and connect to his car’s antenna using a BNC connector. Not as good as his old antenna farm, but definitely better than nothing! (4) For ideas on ringing out as much performance as possible from very short antennas (short w.r.t. wavelength) lookup the Internet postings of N6LF (http://www.antennasbyn6lf.com/). Of course, 630 / 600 and 2200 meters are not 1750 meters. But if your goal is to experiment below the AM Broadcast Band, there are all sorts of possibilities at 630 meters. One benefit is you’re permitted more “horsepower” which helps to overcome some of the antenna system losses. Remember, if a Hustler 40 meter mobile whip is say 6 foot tall, a (roughly) scaled antenna for 470 KHz would be around 89 feet tall. If the best you can do is say 30 or 40 feet, it’s still better than nothing. GL, be safe, have fun – 73 Frank K3DZ / WH2XHA Re: Limited Space Antenna Suggestions
Yes, I am in Canada. Re: Any Successful Restricted Space 1750M Antenna Designs?
Talked to the neighbours and a short pole is doable. Re: Allouis 162 kHz update
This time signal is critical for over 200,000 devices, which are deployed within French enterprises and state entities, like the French railways SNCF, the electricity distributor ENEDIS, airports, hospitals, municipalities, et cetera. (Wiki)
Re: EXP-1750 assembly manual
Many thanks to Dave Curry!! short antennas at MF / LF
ref: (1) LWCA Message Board #6991 and others around that time about limited space antennas and (2) http://njdtechnologies.net/whats-the-dumbest-antenna-ive-ever-tried-on-630-meters/ Reference #2 has some excellent ideas what can be done on 630 meters with vertical antennas around 8 foot tall. One could ask what the antenna really is - the short vertical radiator or the combination of clap-trap - the loading coils, coax lines, and short vertical radiator, ground stake, etc. Regardless, the author has demonstrated what can be done with an extremely anemic setup!!! My gut feeling is the article's suggestions can be applied to 1750 meters. As I said in a prior posting, "any antenna is better than no antenna!" 73 Frank K3DZ / WH2XHA
Re: EXP-1750 assembly manual
If anyone needs this manual, Email me MYCALL at ARRL dot Net Or right-click to download from: lwca.org/library/hardware/Curry/EXP1750a.pdf 73 Ralph
Re: short antennas at MF / LF
Depends on what your expectations are. A signal to noise difference of approximately 35 dB between these two bands is going to seriously hinder any chance for 1750 m DX with a compromised antenna! Consider: (1. The transmitter power John Langridge normally runs is a good 20 dB greater than that allowed under Part 15/RSS-210 at 1750 meters. (2. An electrically short antenna of a given physical size has a radiation resistance that varies with the square of the frequency, so on average the antenna efficiency will be roughly another 10 dB worse at 1750 m (more, if coil losses are also greater). And, (3. On average, QRN is inversely proportional to frequency, resulting in about 5 dB more noise to overcome. That's where the 35 dB figure comes from. There are additional variables between the two bands, such as different effective soil conductivity due to differing skin effect depths, and different QRM sources found in the two bands (lots of PLCs and SMPSs at 1750 m, for instance, not so many at 630 m). Those additional factors are harder to quantify because they also depend heavily on the geographical locales of the sender and listener...but on average, they do tend to be worse at LF than low MF. These are not hypothetical considerations. I wasted a lot of time in the 1990s trying to get antennas at a somewhat more promising site than Gregg's to transmit beyond the county line. I've also spent a fair amount of time in recent years monitoring John L's experiments at various power levels and with unconventional antenna configurations. I'm close enough to him that even the worst signals could be copied most of the time; but the nighttime spot maps in the blog are obviously populated by a lot fewer receiving sites than his normal signal, and none of those substitute antennas ever allowed him to get outside the Americas so far as I know. Cut that performance back by reducing signal-to-noise ratio another 35 dB, and what's going to be left? Not much! That's why most LowFERs put so much effort into their antenna and ground systems. Anyone is certainly free to experiment with any 1750 meter antenna they want, within the rules, but they should go into it with realistic expectations. To the original question of whether there are proven successful 1750 meter antennas in such restricted space, unfortunately, the correct answer is still "no." John
Re: K6FRC - Strong Today
Thanks for the report, Jack! 10m propagation is absolutely amazing. We never stop learning. VY 73 DE K6FRC 200 mW beacons on the air..
I am running 2 Ham Radio beacons one on 30 meters the other on 20 meters both beacons are WSPRLite transmitters by SOTA Beams. They are both transmitting with a power of 200 mW. Transmitting my WSPR CALLSIGN WB3ANQ. They have both been operating 24 hours a day and have received many reports world wide!
Summer Solstice HiFERs
Just after local solar noon (1:13 PM CDT, according to the shadows of the markers on my surveyed reference line) I set up the radio and caught USC, NC, EH, SIW slant, RY and SIW WSPR at the watering hole! The SIWs did not hang around long, however, and RY was broken up quite a bit during the afternoon. Up the dial, I got what I think was one dash from PBJ before it faded out for the afternoon. Farther up, GNK was loud one second, gone the next, but was identifiable most of the time. Nobody else heard or seen today, apart from codar. John
longwave
hello my name is bram and i have a radiostadion on longwave on 261khz from holland, power is 13 watt and they receive me in whol europe with a vertical antenna 5 meters long
R-X Bridge Measurements
There have been some recent interesting postings on different message boards regarding experimentation around 8 KHz. One of the authors suggested to the effect that he plans to measure the (contemplated) antenna system's feed point impedance with an R-X bridge. Eventually he plans to dump a few hundred watts into the antenna via a yet to be constructed matching circuit. I assume he will use the R-X bridge measurements to assist in designing a transmitter to antenna matching circuit. Excellent food for thought !!!! A question - At ELF, VLF, or for that matter, any frequency where the immediate ground conditions are replied upon to be an integral part of the antenna system, how valuable is a "flea power" R-X bridge measurement of impedance when 10's or 100's of watts of RF power will be used? In other words, is the antenna's impedance a constant that is "not" amplitude dependent? For the "ideal dipole" in free space, definitely the antenna input impedance is amplitude independent. I can also appreciate for antennas where the ground conditions play an integral part of the antenna system, weather / soil moisture content will indeed effect the antenna's driven impedance. 73 Frank K3DZ / WH2XHA Re: R-X Bridge Measurements
It is indeed an interesting experiment, and I hope he has much success with it. Having a long baseline of greater than 2 miles should be a lot more effective than my own experiment in Georgia was, although I'm sure such a long line will present additional problems of its own to overcome. My own experiments did not show any amplitude dependence in the impedance measurement. That was with a few milliwatts testing, 70 to 100 watts operating, and only several hundred feet separation. I can't think of any physical reason why it would be significantly different with higher power levels, though, provided that the ground system at each end is ample to disperse the current without excessive localized heating of the soil. What's more likely to be a problem is the level of DC and AC powerline voltages appearing at the measurement point. The R-X bridge will need to be able to cope with those stray voltages in order to avoid measurement errors at the operating frequency.
WSPR Time Synch
ref: Sotabeams "WSPRlite," ref http://www.sotabeams.co.uk/wsprlite An interesting device! I definitely find it appealing that one does not have to tie up a PC to run WSPR! Can anyone comment on the ability of the transmitter's clock to maintain adequate time accuracy over a period of hours / days to meet the time synchronization requirements of WSPR? 73 Frank K3DZ / WH2XHA Re: WSPR Time Synch
Perfect timing. :)) I contacted the designer/seller last Thursday about the same thing, he replied that it will keep the time accurate for up to 30 days. What one needs to do is to restart it every 30 days. A remote installation may be a problem in this case. I ordered one after I received the answer. Its currently on a plane from the UK to Canada. Regards, Vince, VA3VF
Re: WSPR Time Synch
It certainly is an interesting device, and not tying up a computer continuously is a considerable advantage. (Would that more Software Dependent Radios took that approach.) I hope someone who has one will comment on its clock stability. ¡Oops! Just as I went to post this, I see Vince has done so. Thanks! The literature and video online indicate this unit's original or primary function is antenna testing & comparisons, where 2 second stability over several hours is quite adequate. Since they do not advertise temperature compensation or any other means for assuring longer term stability, one would be justified in assuming it doesn't have such. Knowing its stability would be a great selling point. Even so, for really long term unattended operation, or for operation outside temperature controlled environments, it's probably not ideal. The Ultimate 3S kit with the GPS option would probably be a better bet in that situation, and at a price more or less in the same ballpark. It's also worth noting that SOTA adds at the bottom of the page, "US customers should operate in accordance with FCC Regulation Section 97.203" ...which basically says we can't use it as an automatic (unattended) beacon in any of the frequency ranges where it is capable of operating, anyway. Re: WSPR Time Synch
Hi John, I did not pay a lot of attention to the WSPRLite when it was released for the reason it was advertised as an antenna performance tool. To view the results of the experiments, the WSPRLite page points to their own site, called DXplorer. The other questions I had for the developer were related to that. Although the WSPRLite has its own page, the transmissions are all within the 'recognized' WSPR frequencies in the ham bands. The WSPRNet site will show WSPRLite spots like any other WSPR signal. The frequency is selected at random on power up. If it coincides with another transmission, all one needs to do is to reboot the WSPLite, and it will select another frequency of operation within the band it's configured for. As for frequency stability, I'll put it to test, as I plan to install it in my garage, next to the Raspberry Pi 3 I already have there receiving ADS-B signals, and feeding them the FlighAware and FlightRadar24. 73 de Vince, VA3VF
630m JT65 FDTEST
I started listening to JT65 on 474200 Saturday after noon. Nothing heard until after my local sunset when I started decoding WH2XZO. From 04:11 UTC until 04:50 I decoded WI2XSZ. WH2XZO peaked just before sunrise, the last decode of XZO was at 09:47. I used a Kenwood TS-480 and a multiband trap vertical with a LF matching coil, I am located in So. Illinois at EM68es. Mike
JT-65 overnight decodes
0537 -1 -0.1 1197 # FDTEST WH2XZO LowFER Beacon "EAR" Re: JT-65 overnight decodes
73, J.B., VE3EAR
WSPRlite measurements
A purpose of the WSPRlite transmitter is to allow one to make "real measurements" of their antenna system. A benefit of WSPRlite is once the little transmitter is setup, the setup PC can be used for other purposes. However, to get info on the transmit antenna's performance, an Internet connected PC will have to be brought back into the picture, at least for the time it takes the WSPRlite DX software to do its job. As I recall, HF transmit / receive paths are reciprocal (I hope I'm using the correct term). My question: Can the antenna "real measurements" have been done only by listening to other WSPR transmissions and then appropriately manipulating the data contained in one's WSPR receive log? As far as I know, a PC will have to be dedicated to the receive only measurement approach ... and ... some sort of means (computer analysis program or manual data analysis method) to bring together the listening station's receive log to plot / analyze / determine the antenna's performance. The "receive only" approach seems to be the "long way around" to determine antenna performance / characteristics. The WSPRlite approach definitely seems to be less fraught with operator error, HI. 73 Frank K3DZ / WH2XHA
RTÉ 252 - Ireland
Radio 1 announced on their longwave 252 kHz frequency at 1700 UTC today (Sunday 25 June) that they will be off air on 252 kHz from "half-past twelve Tuesday 27th June until the same time on Saturday 8th July" (local time = UTC +1) This is for a replacement of the base-plate of the transmission mast according to the announcement. Re: RTÉ 252 - Ireland
That's a very massive undertaking...literally! I hope the weather is cooperative and that all goes smoothly for the sake of the mast and all personnel involved. If they post any pictures of the work in progress, Mike, please be sure to let us know. John
Re: WSPRlite measurements
There's some debate about just how reciprocal HF paths are, regarding direction of propagation. However, that's not the only factor which will affect how difficult it will be to get good performance comparisons, and you are correct in thinking the receive-only approach is messier. In the receive-only case, the local noise environment and the antenna's directional properties will both affect the results, and log files from the WSPR receive software alone will not be enough to help you distinguish between antenna gain at different orientations versus noise pickup at different orientations. Or, if you are simply attempting to compare two different antennas' relative gain while both are oriented in the same direction, even that will be complicated if one of them has a null in the direction of a local noise source while the other does not. On the other hand, in the transmit-only case, if you are monitoring one receive site that uses the same antenna throughout the test period and has a reasonably constant local background level, then you eliminate a lot of extraneous variables right from the start. If antenna A gives you X dB better WSPR S/N ratio than antenna B, over long enough time to average out QSB effects, then that's how many dB gain difference there is between them. Pretty straightforward that way. John
Re: WSPR Time Synch
I wondered about that, as I did not notice the guy in the video actually setting a specific frequency, just choosing a band. That shouldn't be a problem in the ham bands, but alas, it's another factor that would make it impractical for Part 15-type uses.
Palstar MW550 for sale
Have a Palstar MW550P it is a tuner specifically for the Medium Wave and will tune up to 2.8 Mhz. It has a receive PREAMP and comes with an AC adapter. This is NOT an antenna tuner as it in NOT designed to transmitted through. It is a receive tuner/preselector. Re: RTÉ 252 - Ireland
With RTÉ temporarily off air Alger Chaîne 3 on 252 kHz was solid and clear last night in southern England.
potrzebie
1652 -16 -0.8 0.137527 0 WH2XND DM33 40
1656 -14 -0.7 0.137527 0 WH2XND DM33 40
- - -
1820 -20 -0.8 0.137527 0 WH2XND DM33 40
1824 -21 -0.8 0.137527 0 WH2XND DM33 40
1828 -20 -0.9 0.137527 0 WH2XND DM33 40
1832 -21 -0.8 0.137527 0 WH2XND DM33 40
1836 -20 -1.5 0.137527 0 WH2XND DM33 40
1840 -20 -0.8 0.137527 0 WH2XND DM33 40
1844 -21 -0.8 0.137527 0 WH2XND DM33 40
1848 -23 -0.9 0.137527 0 WH2XND DM33 40
1852 -22 -0.8 0.137527 0 WH2XND DM33 40
1856 -22 -0.8 0.137527 0 WH2XND DM33 40
1900 -22 -0.9 0.137527 0 WH2XND DM33 40
1904 -23 -0.8 0.137527 0 WH2XND DM33 40
1908 -22 -0.8 0.137527 0 WH2XND DM33 40
1912 -23 -0.9 0.137527 0 WH2XND DM33 40
1916 -25 -0.9 0.137527 0 WH2XND DM33 40
1920 -26 -1.0 0.137527 0 WH2XND DM33 40
1928 -22 -0.8 0.137527 0 WH2XND DM33 40
1932 -24 -1.0 0.137527 0 WH2XND DM33 40
1936 -24 -0.9 0.137527 0 WH2XND DM33 40
1940 -23 -0.9 0.137527 0 WH2XND DM33 40
1944 -25 -0.8 0.137527 0 WH2XND DM33 40
File Attachment 1: 06jun1.jpg
File Attachment 2: 06juna22.jpg
Posted by John Bruce McCreath on June 07, 2017 at 12:50:01.
Here are my overnight loggings of WH2XND as received in Saltford, ON, Canada.
Antenna is a 10 ft. VE7SL style octagonal loop and receiver is a TS-440SAT.
0704 -27 -0.9 0.137528 0 WH2XND DM33 40
0708 -28 -0.9 0.137528 0 WH2XND DM33 40
0712 -26 -0.8 0.137528 0 WH2XND DM33 40
0716 -24 -0.9 0.137528 0 WH2XND DM33 40
0720 -25 -0.8 0.137528 0 WH2XND DM33 40
0724 -26 -0.8 0.137528 0 WH2XND DM33 40
0820 -27 -0.8 0.137528 0 WH2XND DM33 40
0828 -28 -1.0 0.137528 0 WH2XND DM33 40
0832 -29 -0.8 0.137528 0 WH2XND DM33 40
0920 -30 -0.9 0.137528 0 WH2XND DM33 40
0924 -26 -0.9 0.137528 0 WH2XND DM33 40
0928 -24 -0.9 0.137528 0 WH2XND DM33 40
0932 -24 -1.1 0.137528 0 WH2XND DM33 40
0936 -25 -1.0 0.137528 0 WH2XND DM33 40
0940 -24 -0.8 0.137528 0 WH2XND DM33 40
0944 -25 -0.9 0.137528 0 WH2XND DM33 40
0952 -26 -0.8 0.137528 0 WH2XND DM33 40
0956 -23 -0.9 0.137528 0 WH2XND DM33 40
1000 -30 -1.0 0.137528 0 WH2XND DM33 40
Posted by John Davis on June 08, 2017 at 06:25:13.
In reply to WH2XND posted by John Davis on June 07, 2017
0412 -25 -0.8 0.137527 0 WH2XND DM33 40
0416 -24 -0.8 0.137527 0 WH2XND DM33 40
0420 -24 -0.8 0.137527 0 WH2XND DM33 40
0424 -19 -0.6 0.137527 0 WH2XND DM33 40
0428 -19 -0.6 0.137527 0 WH2XND DM33 40
0432 -22 -0.7 0.137527 0 WH2XND DM33 40
0436 -20 -0.7 0.137527 0 WH2XND DM33 40
0440 -21 -0.8 0.137527 0 WH2XND DM33 40
0444 -27 -0.8 0.137527 0 WH2XND DM33 40
0452 -24 -0.7 0.137527 0 WH2XND DM33 40
0456 -21 -0.8 0.137527 0 WH2XND DM33 40
0504 -29 -0.8 0.137527 0 WH2XND DM33 40
0508 -20 -0.8 0.137527 0 WH2XND DM33 40
0512 -18 -0.7 0.137527 0 WH2XND DM33 40
0516 -17 -0.8 0.137527 0 WH2XND DM33 40
Posted by Ralph Lovering WA1UOL on June 08, 2017 at 23:16:36.
Anyone have a copy of the Dave Curry EXP 1750 LW Tranceiver kit assembly manual? I bought the kit years ago and finally went to put it together and the manual is missing!! Any help would be much appreciated.
73
Ralph WA1UOL
Posted by Lee on June 08, 2017 at 23:40:12.
In reply to EXP-1750 assembly manual posted by Ralph Lovering WA1UOL on June 08, 2017
Posted by John Davis on June 10, 2017 at 03:55:46.
In reply to Re: WH2XND posted by John Davis on June 08, 2017
Posted by John Davis on June 10, 2017 at 22:54:10.
In reply to Re: WH2XND (Thursday) posted by John Davis on June 10, 2017
Posted by Mike Terry on June 11, 2017 at 06:23:47.
http://radioforum.foren.mysnip.de/read.php?8773,1269879,1420479#msg-1420479
Apparently summarizing French sources as follows: No broadcaster has filed a serious application for using 162 kHz, so the carrier will remain silent, i.e. without program audio in AM. For the plain time signal application the output has now been adjusted to 1100 kW, with wrist watches for this system being mentioned as primary reason for still running so much power.
Kai Ludwig, dxld yg (10/5-2017)
Posted by John Davis on June 11, 2017 at 20:52:15.
File Attachment 1: 10junEAR.jpg
Posted by John Bruce McCreath on June 12, 2017 at 12:08:57.
In reply to A Fuzzy Pair of EARs posted by John Davis on June 11, 2017
Posted by Gregg on June 13, 2017 at 07:56:40.
In reply to EXP-1750 assembly manual posted by Ralph Lovering WA1UOL on June 08, 2017
Posted by Gregg on June 13, 2017 at 08:01:48.
Got a LowFER becon in the works for the upcoming season, alas my new QTH is a fraction of the size of my old one and I basically have 8' x 24' to play with. No trees, no tie points, gotta be self supporting without a tower (nervous neighbours - had a lightning hit on a tree few years back and everyone is a Nelly about poles sticking up).
Any successful designs out there?
73's
Posted by Ralph Lovering on June 13, 2017 at 14:02:17.
In reply to EXP-1750 assembly manual posted by Ralph Lovering WA1UOL on June 08, 2017
I have contacted Dave Curry, and he is trying to see what he can find.
The online info is helpful, but nothing seems to have a schematic and parts list
for the EXP 1750.
Still looking for any info on the Curry EXP 1750,....Thanks!
73 de WA1UOL
Posted by John Davis on June 13, 2017 at 21:46:14.
In reply to Any Successful Restricted Space 1750M Antenna Designs? posted by Gregg on June 13, 2017
Gregg wrote:
Any successful designs out there?
Posted by John Davis on June 13, 2017 at 21:58:00.
In reply to Re: EXP-1750 assembly manual posted by Ralph Lovering on June 13, 2017
Ralph wrote:
The online info is helpful, but nothing seems to have a schematic and parts list for the EXP 1750.
Posted by Jack Roblin on June 14, 2017 at 05:51:08.
Posted by John Davis on June 14, 2017 at 14:27:01.
In reply to K6FRC - Strong Today posted by Jack Roblin on June 14, 2017
Posted by ed holland on June 14, 2017 at 19:40:19.
Posted by Frank Lotito on June 15, 2017 at 12:15:09.
Posted by Gregg on June 16, 2017 at 06:07:11.
In reply to Limited Space Antenna Suggestions posted by Frank Lotito on June 15, 2017
Thank you for your suggestions, but it isn't happenng for reasons I won't go in here.
Cheers!
Posted by Gregg on June 16, 2017 at 06:12:55.
In reply to Re: Any Successful Restricted Space 1750M Antenna Designs? posted by John Davis on June 13, 2017
We're actually low compared to the trees and very tall hydro towers surrounding us, but it didn't stop a rogue bolt of lightning on a dead, 15' tree in the back yard to cause tens of thousands of $ damage for several flats around us.
Posted by Mike Terry on June 16, 2017 at 15:42:17.
In reply to Allouis 162 kHz update posted by Mike Terry on June 11, 2017
Posted by Ralph Lovering WA1UOL on June 16, 2017 at 20:04:20.
In reply to Re: EXP-1750 assembly manual posted by Ralph Lovering on June 13, 2017
He emailed me a PDF of the manual today.
Looks like a box of parts will become a transceiver
one of these days!
Very happy!
73 de WA1UOL
Posted by Frank Lotito on June 17, 2017 at 14:53:44.
Posted by Ralph Lovering WA1UOL on June 17, 2017 at 16:30:23.
In reply to EXP-1750 assembly manual posted by Ralph Lovering WA1UOL on June 08, 2017
Dave Curry gave me permission
to share and post it.
Thanks Dave!!
Posted by John Davis on June 17, 2017 at 18:54:54.
In reply to short antennas at MF / LF posted by Frank Lotito on June 17, 2017
My gut feeling is the article's suggestions can be applied to 1750 meters.
As I said in a prior posting, "any antenna is better than no antenna!"
Posted by Paul on June 17, 2017 at 23:19:13.
In reply to K6FRC - Strong Today posted by Jack Roblin on June 14, 2017
Posted by Larry Putman WB3ANQ on June 20, 2017 at 16:54:36.
30 meter frequency is 10.114080 Mhz and the 20 meter frequency is 14,07940 MHz.
Posted by John Davis on June 22, 2017 at 05:32:37.
Posted by bram on June 22, 2017 at 15:45:53.
Posted by Frank Lotito on June 22, 2017 at 16:48:31.
Posted by John Davis on June 22, 2017 at 17:43:50.
In reply to R-X Bridge Measurements posted by Frank Lotito on June 22, 2017
Posted by Frank Lotito on June 22, 2017 at 19:39:00.
Posted by Vince on June 24, 2017 at 20:05:55.
In reply to WSPR Time Synch posted by Frank Lotito on June 22, 2017
Posted by John Davis on June 24, 2017 at 20:34:20.
In reply to WSPR Time Synch posted by Frank Lotito on June 22, 2017
Posted by Vince on June 24, 2017 at 21:45:39.
In reply to Re: WSPR Time Synch posted by John Davis on June 24, 2017
Posted by Mike N8OOU on June 25, 2017 at 13:16:29.
Posted by John Bruce McCreath on June 25, 2017 at 13:30:41.
Nothing heard/seen from Neil, but I was rewarded with this:
0717 -1 0.1 1198 # FDTEST WH2XZO
0719 -1 0.2 1198 # FDTEST WH2XZO
0721 -1 0.2 1198 # FDTEST WH2XZO
0725 -1 0.1 1198 # FDTEST WH2XZO
0741 -1 0.2 1198 # FDTEST WH2XZO
0743 -1 0.2 1198 # FDTEST WH2XZO
0745 -1 0.3 1198 # FDTEST WH2XZO
0807 -1 0.1 1198 # FDTEST WH2XZO
0809 -1 0.2 1198 # FDTEST WH2XZO
0825 -1 0.2 1198 # FDTEST WH2XZO
0827 -1 0.2 1198 # FDTEST WH2XZO
73, J.B., VE3EAR
188.830 kHz. QRSS30
EN93dr
Posted by John Bruce McCreath on June 25, 2017 at 13:36:18.
In reply to JT-65 overnight decodes posted by John Bruce McCreath on June 25, 2017
I neglected to mention that the JT-65 decodes were on 630M, 474.200 dial.
Posted by Frank Lotito on June 25, 2017 at 15:55:23.
Posted by Mike Terry on June 25, 2017 at 19:33:06.
73 Alan Pennington - BDXC.
Posted by John Davis on June 25, 2017 at 20:46:36.
In reply to RTÉ 252 - Ireland posted by Mike Terry on June 25, 2017
Posted by John Davis on June 25, 2017 at 21:46:11.
In reply to WSPRlite measurements posted by Frank Lotito on June 25, 2017
Frank wrote:
As I recall, HF transmit / receive paths are reciprocal (I hope I'm using the correct term). My question: Can the antenna "real measurements" have been done only by listening to other WSPR transmissions and then appropriately manipulating the data contained in one's WSPR receive log?
Posted by John Davis on June 25, 2017 at 21:57:36.
In reply to Re: WSPR Time Synch posted by Vince on June 24, 2017
...the transmissions are all within the 'recognized' WSPR frequencies in the ham bands. .... The frequency is selected at random on power up.
Posted by Tony R Spiegel KC8UR on June 26, 2017 at 03:23:40.
The antenna attached to the INPUT and Receiver to the OUTPUT. I would be willing to trade for something radio related. It sells new for $359.95 but I will take it at a loss. I want to find it a good home to a serious MW listener. I can be reached at [email address shown above] or 740-392-7586 home. Please contact me if interested. I want it to be used. It was designed by my friend at Palstar located in Piqua Ohio.
Posted by Mike Terry on June 29, 2017 at 05:36:29.
In reply to Re: RTÉ 252 - Ireland posted by John Davis on June 25, 2017