Heard this morning (1-Dec-15)
Circa 8:30am, quite an interesting short listening session...
Finally some action around "The Watering Hole" which previously has been a black hole here in California:
Possibly WM on 13,555.300
I think SIW around 13,555.44~
An upward slanting periodic signal, sounding like an oscillator turning on and settling at around 13,55640.
Then a mystery at ~13,56300. Very clear Morse, often readable by ear repeating KC7MMI. No mistake, but not on the Hifer list.
Cheers,
Ed
Re: SPT Beacon Blog-Post
Posted by Dave AA7EE on December 02, 2015 at 18:48:46.
In reply to Re: SPT Beacon Blog-Post posted by Ed Holland on November 24, 2015
Thanks for trying Ed. I don't think the ground wave for such a low power signal extends very far - we are probably in each other's dead zones for 22M QRPp.
Still, you never know!
Dave Re: Planning a Hifer
Posted by Dave AA7EE on December 02, 2015 at 18:52:39.
In reply to Re: Planning a Hifer posted by Ed Holland on November 26, 2015
In many other areas of radio endeavor, 1.25W would be considered low power, but we are a special breed!
I don't know the circuit for your TX, but perhaps you can try lowering the supply voltage. Also, is there a drive control between the buffer and the final? If not, you may be able to adjust the coupling between those stages to lower the drive to the final.
Best of luck, and keep us posted,
Dave
Re: Heard this morning (1-Dec-15)
Posted by John Davis on December 02, 2015 at 19:20:04.
In reply to Heard this morning (1-Dec-15) posted by Ed Holland on December 01, 2015
>>>...often readable by ear repeating KC7MMI.
Yours is the first report of this one, Ed. By now, you've probably looked up the ham call on qrz.com or hamcall.net and found that it belongs to Benjamin Russell of Mesa, Arizona.
>>>No mistake, but not on the Hifer list.
Most likely, Mr Russell is either (a) still doing preliminary testing and will let us know his plans soon; or (b) a newcomer who heard about HiFERing somewhere else and isn't aware of this group or our list yet. If you mail him a reception report, it would be good to mention this site to him as a useful resource.
Our policy on previously unknown becaons is to see if the same reporter hears the signal again on subsequent sessions, or if other listeners report it too, before adding it to the list. We don't necessarily have to hear from the operator himself, but we do like to make sure the signal is on regularly and was not just a one-off test. So, do let us know if you hear him again!
(Of course, there are a number of HF "beacons" that don't seek publicity because they are not attempting to comply with Part 15 rules. However, that's not likely to be the case here. Very few folks with hard-earned amateur licenses are willing to jeopardize them by openly sticking their call signs on a known illegal signal. I suppose there's also a small but real possibility of identity theft. Some pirate operators will invent a call or misappropriate a real one, as appears to happen sometimes at 630 meters.)
John
Re: Heard this morning (1-Dec-15)
Posted by Ed Holland on December 02, 2015 at 20:59:03.
In reply to Re: Heard this morning (1-Dec-15) posted by John Davis on December 02, 2015
Thanks John,
Yes indeed, I did look up the callsign. Further limited "googling" has not turned up anything else. Very solid copy, but then again when conditions are right, other Arizona stations on the Hifer list are comparable.
In fact I have heard this signal before, but wasn't able to read a complete callsign with enough confidence to report it. This time it was absolutely the strongest thing going in 22m.
I will keep listening and report what I find.
Ed
Re: Planning a Hifer
Posted by Ed Holland on December 02, 2015 at 21:49:10.
In reply to Re: Planning a Hifer posted by Dave AA7EE on December 02, 2015
Thanks for your thoughts Dave.
The transmitter kit is completed and working as designed, with ~1W int a dummy load. The TX circuit starting point is the Vectronics 20m kit, which also now works happily with a 22m crystal:
http://www.vectronics.com/Product.php?productid=VEC-1220K
This has an oscillator circuit and buffer stage, both of which are keyed by a pnp transistor in the +v supply. The final amplifier transistor receives power continuously and operates in class C mode. I plan to change the keying supply to allow the oscillator to run continuously. This would open up one option to alter the buffer amp supply to provide output power adjustment. Failing that, a simple resistive attenuator at the output will work, and to heck with the 998mW waste!
Interestingly (or not) whilst playing yesterday with the tuning range, I noted that simply holding the connections to the key input provided enough bias to the keying transistor for the oscillator to start.
Although I haven't set up the keyer module yet, I may put together a simple pulse keyer to get things on the air once I get this enormous surfeit of power under control. I'll notify the message board whatever happens
Regards,
Ed re:lowfer beacon KH
Posted by Ken Hude WB8ZYZ on December 03, 2015 at 17:09:21.
185.8 KH beacon is delayed, Antenna now up, 30 ft vertical radiator w/18ft top hat. will use ultimate 3 as xmitter for now, working on loading coil now. NOTE: A poorly trained wife on a tractor is not a good idea when raising antennas.
Saturday Afternoon HiFERs and LowFERs
Posted by John Davis on December 05, 2015 at 23:18:41.
Thoroughly visible in late morning and again at mid-afternoon: NC, USC, PBJ; and mostly audible: MTI. There were wide fluctuations in level, though. RY started howing up after noon and continue to sunset, with an R here and a Y there, but lot of broken dashes and dots between--only one complete ID that I could see.
After 3 PM CST, the Illinois path opened up somewhat, albeit with lots of multipath showing up. Both 22 meter SIWs came through, and eventually so did WM. No sign of 9ZS, though.
From 12:25 to 3 PM, I was watching SIW slant mode on 185.185 kHz, simultaneously keeping an eye out for any appearance of WM at the watering hole. No luck on the latter, though. The SIW slant flat-tops on both the high and low sides at present, which results in a sort of three-level DFCW mode. Looks like it would be pretty robust.
For the last hour and a half I've been watching MP around 137.7795 (a bit low). Thought maybe someone else would be on near that spot, being a December weekend, but apparently nobody was taking advantage of the low 'sferics to to some groundwave DX.
John
Reception report of my PBJ Hifer received in New Zealand
Posted by Chris Waldrup on December 06, 2015 at 16:17:52.
Hi,
ZL1RS sent me a reception report this morning of my Hifer beacon as received in New Zealand! That's quite some DX for an Epson oscillator into a dipole!
Chris Re: Reception report of my PBJ Hifer received in New Zealand
KD4PBJ
Tracy City, TN
Posted by Dave on December 06, 2015 at 17:19:01.
In reply to Reception report of my PBJ Hifer received in New Zealand posted by Chris Waldrup on December 06, 2015
ZL1RS deserves a QSL card for that! Congratulations to both of you! Re: Reception report of my PBJ Hifer received in New Zealand
Dave
Posted by Paul on December 06, 2015 at 17:23:59.
In reply to Re: Reception report of my PBJ Hifer received in New Zealand posted by Dave on December 06, 2015
Agreed. Nice work!
By the way, it seems worthwhile to print up some HiFer QSL cards. I ordered 500 cards shortly after FRC went on the air many years ago. Have probably sent out close to half of them so far.
BT
I see that Sue over at CheapQSLs.com will do orders much smaller than 500 now.
Re: Planning a Hifer
Posted by Paul on December 06, 2015 at 17:27:00.
In reply to Re: Planning a Hifer posted by Dave AA7EE on December 02, 2015
I built on a long time ago where I just bypassed the driver stage and fed the buffer directly into the PA transistor. Output was a handful of milliwatts, and the whole thing ran ice cold, no need to a big heatsink. Was able to mount the whole thing in a really small aluminum box and mounted it to the wall, no fan required. It ran for YEARS like that. Ended up giving that one away to a friend years ago. Otherwise, it would probably still be on the air today.
Re: Reception report of my PBJ Hifer received in New Zealand
Posted by Chris Waldrup on December 06, 2015 at 18:11:14.
In reply to Re: Reception report of my PBJ Hifer received in New Zealand posted by Paul on December 06, 2015
I agree as well. I told Bob this morning that I'd send one out.
That's a great report from Tennessee to New Zealand!
Chris Re: Reception report of my PBJ Hifer received in New Zealand
KD4PBJ
Posted by Chris Waldrup on December 06, 2015 at 20:26:20.
In reply to Re: Reception report of my PBJ Hifer received in New Zealand posted by Chris Waldrup on December 06, 2015
Excerpt of the capture:
Or, click to open the full capture in a new window.
Re: Reception report of my PBJ Hifer received in New Zealand
Posted by Joe on December 07, 2015 at 17:48:57.
In reply to Re: Reception report of my PBJ Hifer received in New Zealand posted by Chris Waldrup on December 06, 2015
Congratulations, Chris!
Re: Planning a Hifer
Posted by Ed Holland on December 07, 2015 at 22:37:25.
In reply to Planning a Hifer posted by Ed Holland on October 15, 2015
Nearly there, but rather like the frog who at each leap covers half the remaining distance across the pond, I wonder if I'll make it..
Jokes aside, I had to attend to the antenna after strong winds left it at a curious angle.Fortunately there was no damage done, and it is returned to vertical, much sturdier than before.
Then there was only time for a little circuit tinkering, but I now have a complete set of leads to connect everything via the tuner. Last step is to add the attenuator to the transmitter - maybe tonight. Then I'll at least put a carrier out for testing and add a notification here. It would be better if I could contrive an on-off keying, but I'm not sure what I have that is simple...
Cheers
Ed
Re: Reception report of my PBJ Hifer received in New Zealand
Posted by Sal, K1RGO on December 07, 2015 at 23:55:41.
In reply to Reception report of my PBJ Hifer received in New Zealand posted by Chris Waldrup on December 06, 2015
Hi Chris Re: Reception report of my PBJ Hifer received in New Zealand
I just got an email also from ZL1RS with a screenshot of my EH FSK beacon, looks like propagation we had in 2012 when hifers were copied in New South Wales.
later..........Sal
Posted by Mike - N8OOU on December 08, 2015 at 00:59:55.
In reply to Reception report of my PBJ Hifer received in New Zealand posted by Chris Waldrup on December 06, 2015
Just to help document the propagation opening, ZL1RS emailed me a capture of the WM HiFER this afternoon. He stated he was using a 60m long BOG antenna oriented to NA.
WM and EH in NZ
Posted by Bob Sutton ZL1RS on December 08, 2015 at 04:54:00.
(Forwarded from e-mail by Bob to the webmaster earlier today:)
Still on the sub-standard RX antenna, but I got the 'scratchy' FSK CW as per the attached that appears to be "WM" at around 07:10 UTC (near my sunset). The frequency of the transmission was 13.555300 MHz (my RX calibration is pretty good ... + or - 1 or 2 Hz at the worst).
"WM" came through quite clearly at about 08:40 UTC. Also about that time I caught what looks very much like "EH" (attached). The frequency of the 'mark' tone was 13.55547 MHz. There was another QRSS FSK station approximately 40Hz higher in frequency, but it was too weak to 'decode'.
Now at 09 UTC the band appears to have faded.
Tomorrow promises to be a fine day, so the better RX antenna MUST go up! I'm steadily working on the phased Beverage antenna array and it should be finished soon, so we will see what tonight brings.
73, Bob ZL1RS
Re: WM and EH in NZ
Posted by Bob ZL1RS on December 08, 2015 at 06:38:58.
In reply to WM and EH in NZ posted by Bob Sutton ZL1RS on December 08, 2015
The phased beverages are going. WM and PBJ are perfect copy. I'm working to 'decode' some other weaker ones ...
73, Bob
Re: WM and EH in NZ
Posted by Bob ZL1RS on December 08, 2015 at 06:56:42.
In reply to WM and EH in NZ posted by Bob Sutton ZL1RS on December 08, 2015
Screen shots of WM and PBJ just now ...
http://www.qsl.net/z/zl1rs//images/WM_2015_12_08.jpg
http://www.qsl.net/z/zl1rs//images/PBJ_2015_12_08.jpg
73, Bob ZL1RS
Re: WM and EH in NZ
Posted by Bob ZL1RS on December 08, 2015 at 07:12:08.
In reply to WM and EH in NZ posted by Bob Sutton ZL1RS on December 08, 2015
EH came out of nowhere at 07 UTC ...
http://www.qsl.net/z/zl1rs//images/EH_2015_12_08.jpg
73, Bob ZL1RS
Spectrum Lab QRSS USR file please
Posted by Bob ZL1RS on December 08, 2015 at 07:32:31.
In reply to WM and EH in NZ posted by Bob Sutton ZL1RS on December 08, 2015
The two weak ones I have been following ...
http://www.qsl.net/z/zl1rs//images/USC_2015_12_08.jpg
At the moment it is a bit of guess work.
I'm using some settings in Spectrum Lab that were found by trial and error. Does someone have a USR file that is 'good' for QRSS display please ... zl1rs@yahoo.com
Thanks and 73, Bob ZL1RS Re: WM and EH in NZ
Posted by John Davis on December 08, 2015 at 18:51:32.
In reply to Re: WM and EH in NZ posted by Bob ZL1RS on December 08, 2015
Remarkable results, Bob!
It looks as if WM is experiencing a fairly constant multipath effect with a steady Doppler shift of about 1 Hz at the time.
In the PBJ capture, it seems pretty clear that sequence of seeming QRSS dots is actually MTI. The latter sends
OOPS! I have no idea where the rest of this message went after I clicked Submit! Missing content appears in a subsequent post. - John
MP 137 Frequency excursion
Posted by Mitch Powell on December 08, 2015 at 19:39:43.
Garry and John A - thanks for frequency check....something creating problems with the DDS, as you have noted. I think I am back on track now - but will shut down for a few weeks of re-wiring and overall checking.
I will leave on until later this afternoon (Tuesday) - then give a notice of QRT for the period - over the next few weeks.
Mitch MP 137 kHz Off Air for Maintenance
Posted by Mitch Powell VE3OT on December 08, 2015 at 22:29:28.
Good day : Re: MP 137 kHz Off Air for Maintenance
MP 137780.5 is will be shut down - this afternoon ( Tue Dec 78) for a few weeks for calibration and some re-wiring. After several years of 24/7 emission - I think it deserves a rest over the Christmas holidays, so will be cleaning it up in preparations for the "high season" on LF.
Thanks for all the reports.
73
Mitch
Posted by John Davis on December 09, 2015 at 03:44:08.
In reply to MP 137 kHz Off Air for Maintenance posted by Mitch Powell VE3OT on December 08, 2015
Wasn't planning to go to the field today, but after reading Mitch's earlier announcement, I thought I'd go try to capture the shutdown. As a bonus afterward, just as I was about to stop Argo, I managed to catch XES signing on and making a brief frequency adjustment. (Use the scroll bar below the image to scroll right and left as needed to see the whole capture. Times shown are CST.)
Re: WM and EH in NZ
Posted by Bob ZL1RS on December 09, 2015 at 04:40:15.
In reply to Re: WM and EH in NZ posted by John Davis on December 08, 2015
Thanks for the tip about MTI John. If propagation is good I will have a listen for the 5WPM CW it sends.
73, Bob ZL1RS
Re: WM and EH in NZ
Posted by John Davis on December 09, 2015 at 06:22:24.
In reply to Re: WM and EH in NZ posted by Bob ZL1RS on December 09, 2015
Most welcome, Bob. What I was starting to say in the previous truncated post was that MTI is slow CW and has relatively long pauses between idents. I was marveling at the relative conistency of signal level at your QTH, which appears to be near the threshold of audibility...maybe a little one side or the other. There's generally lots more variation in strength here over a period of just two or three minutes.
Another factor that is pretty convincing of its identity is that MTI has lately tended to reside about 10 to 15 Hz lower than PBJ, as illustrated in the capture below from two days ago (end time 18:16:30 UTC, 6 December). I had a shot from yesterday showing the spacing closer to 15 Hz, but can't find that one now.
Need Help with LF Antenna Matching Network
Posted by Brian McDaniel on December 09, 2015 at 17:47:25.
Hi. I need a little help from someone with a bigger brain than me.
I'm building a basic spiral antenna for use on 2200 Meters under my experimental license (WH2XOR). I have to match the antenna to a Raspberry Pi, which will be the transmitter. For the matching network, I'm building a W3NQN low pass filter, but the lowest operating frequency he developed was 1.8 MHz, which makes sense as 2200 Meters wasn't an option in 1983.
Can someone help me with the calculation for 137.5 kHz?
Resonance: 1741 kHz
Inductance: 169 uH
Capacity: 147 pF
Resistance: 83 ohms
Here is the link to the G3RJV article I am using for the filter.
http://www.gqrp.com/harmonic_filters.pdf
Many thanks in advance.
73
Brian McDaniel Re: Need Help with LF Antenna Matching Network
KC4LMD
Posted by John Davis on December 09, 2015 at 18:33:38.
In reply to Need Help with LF Antenna Matching Network posted by Brian McDaniel on December 09, 2015
I wouldn't spend too much time or effort on the harmonic filter. A three or five element filter will be more than sufficient since you will also need a large value inductor to resonate the antenna, and that tuned circuit itself will provide plenty of harmonic attenuation. (That inductor will be in series with the antenna at its base. Its value is calculated to resonate with the antenna capacitance at the frequency of operation.)
A suitable 3-element filter can be found in this classic "All in One" LowFER transmitter article by Lyle Koehler. It can more than handle the RF power from a Pi, and values are given for various antenna resistances. You could scale Lyle's filter for a resistance greater than 50 ohms, but really, I'd work instead to improve the ground system under the antenna. Get that resistance value as low as you can, because the radiation resistance of that short an antenna will be miniscule at LF; nearly all the R you measure at the operating frequency will be pure loss.
Another article from our library that may help you understand the matching issues affecting short LF antennas is Lyle's "LowFER Antennas" from 1993. It makes reference to some size limits that only affect Part 15 operation, but the general principles are applicable to all electrically short LF antennas.
John Re: Need Help with LF Antenna Matching Network
Posted by Brian McDaniel on December 09, 2015 at 19:38:53.
In reply to Re: Need Help with LF Antenna Matching Network posted by John Davis on December 09, 2015
John,
Thank you for the advice and links. In my original email I failed to mention that my filter is to take a square wave output signal and make it a sine wave. Shame on me.
As for the antenna improvements, I agree. I do need to get resistance near 50 ohms. My entire experiment is based on inefficient antennas. I will experiment with improvements to ground screens in the second Phase.
My primary experiment is a QRSS adaptation of the Navy research that led to their ELF station in Michigan. This is an Earth Dipole of about 1/32 wavelength at 137.7 kHz.
Next is digital in low S/N environments. I'll be using a Raspberry Pi and WSPR-15 at very low power. The antenna will be a top-loaded spiral antenna.
Thanks for the help. I'll keep the group informed as to my progress.
73,
Brian Re: Need Help with LF Antenna Matching Network
KC4LMD/WH2XOR
Posted by John Davis on December 09, 2015 at 23:53:32.
In reply to Re: Need Help with LF Antenna Matching Network posted by Brian McDaniel on December 09, 2015
>>> my filter is to take a square wave output signal and make it a sine wave.
In the case of the above-ground radiator, the Koehler filter will do that more than adequately, in part because of the loading coil inductance you'll need to resonate with the antenna's capacitance. An earth dipole won't be resonant with such a high Q, though, and could benefit from more sections for harmonic suppression. (And, I forgot to mention that the component values in the article are for the 1750 meter band, and would need to be scaled upward for 2200 meters. Both capacitance and inductance from Lyle's table would be multiplied by 1.257, using the closest standard values. The number of turns on the inductors would be multiplied by the square root of that, or a factor of 1.12 times.)
The final amplifier stage in Lyle's design is a switching amplifier itself, and might make a good output stage to somewhat buffer the Pi's IO port from potentially dangerous ground currents or charges building up on the vertical antenna. Just a thought.
John
Re: Planning a Hifer
Posted by Ed Holland on December 10, 2015 at 04:04:24.
In reply to Re: Planning a Hifer posted by Ed Holland on December 07, 2015
Whilst cycling home on Monday, the solution to temporary keying came to me.... I have a good number of LED "blinkies" surplus to requirements. A quick try out with a few switching combinations, and I think I have an "instant" dash generator. Just the attenuation to go.
Re: Reception report of my PBJ Hifer received in New Zealand
Posted by Dave AA7EE on December 10, 2015 at 18:05:18.
In reply to Reception report of my PBJ Hifer received in New Zealand posted by Chris Waldrup on December 06, 2015
That's amazing Chris. Congratulations!
Dave Re: Planning a Hifer
AA7EE
Posted by Ed Holland on December 11, 2015 at 22:08:16.
In reply to Re: Planning a Hifer posted by Ed Holland on December 07, 2015
Should be on the air this weekend, just the attenuator to go. Signal will be a continuous on-off with about 1s duration, as provided by the "blinky switcher", until I get the more sophisticated keyer working.. I have a junk box antenna current meter lashed up to permit "tuning up"
Reassessment of the tuning range shows this is a bit limited with the compact crystal. I will start out on 13558.400, give or take a little chirp and drift. This seems to be at least 100Hz away from anyone on the list.
I'll post ASAP after throwing the enormous knife switches and waiting for the huge arc suppressors to settle down.
Ed
Beverage antenna change
Posted by Bob ZL1RS on December 12, 2015 at 05:20:00.
The pair of 65 meter (210 feet) long phased Beverages had to be removed due to the paddock being mowed. They have been replaced by a single Beverage about 90 meters (295 feet) long ... the same preamp, low height and 2-radial termination system as shown at http://www.qsl.net/zl1rs/bev.html
05:10 UTC - HiFER "USC" and the 'square wave' signal about 40Hz higher are both about 5dB out of the noise on Spectrum Lab. "PBJ" further up the band is a little weaker but quite 'readable' visually.
73, Bob ZL1RS
SAQ transmission on Christmas Eve Dec 24th 2015
Posted by Mike Terry on December 12, 2015 at 13:01:19.
From: Lars Kalland
12 December 2015
TRADITIONALLY SAQ TRANSMISSION ON CHRISTMAS EVE
DECEMBER 24TH 2015
It is now 10 years since our first Christmas Eve transmissions started.
There will be, as earlier, a transmission with the Alexanderson alternator on VLF 17.2 kHz CW from Grimeton Radio/SAQ in the very early morning on Christmas Eve, Thursday, December 24th 2015.
A message will be transmitted at 08:00 UTC. The transmitter will be tuned up from around 07:30 UTC.
There will be no activity on amateur radio frequencies with the call SK6SAQ this time because the radio room is redecorated and cannot be used.
QSL-reports on SAQ transmission are kindly received:
- E-mail to: info@alexander.n.se
- or via: SM bureau
- or direct by mail to: Alexander - Grimeton Veteranradios Vaenner,
Radiostationen Grimeton 72
SE-432 98 GRIMETON
S W E D E N
Also read our web site: www.alexander.n.se
The radiostation will be open to visitors.
WELCOME!
Yours
SM6NM/Lars
Re: Beverage antenna change
Posted by John Davis on December 12, 2015 at 20:56:35.
In reply to Beverage antenna change posted by Bob ZL1RS on December 12, 2015
Bob, I am most impressed with your Beverage receiving array! And it really is a true Beverage wave antenna, at that.
In the LF community, the term "Beverage" is often used very loosely to refer to any terminated wire antenna, virtually none of which come anywhere close to being one wavelength long, let alone multiple wavelengths. In practice, many of these earthed loops are elongated EWE antennas, which certainly work, but don't have the full directivty of a genuine Beverage.
Even on my on little farm, if I skipped a crop next year and used the full diagonal dimension of the field, I still couldn't stretch out quite enough wire to achieve one wavelength at 630 meters! That's not even LF, strictly speaking. Ironically, I could achieve the wavelength of 550 kHz oriented toward Salina, Kansas, which would give me great reception of KFRM, a popular agricultural station in the Plains region--and which I would no longer have any reason to tune, not having a working farm any more! ;) So, I long ago stopped dreaming about Beverage antennas at my listening post.
However, a HiFER Beverage is another matter! As pleased as I normally am with my simple vertical, it frequently becomes obvious during HiFER monitoring sessions that I would benefit greatly from the ability to reject off-axis noise. I've considered a loop and a rotator on a pole, but haven't been motivated enough to actually put forth the physical effort. Also, I'm concerned that a so obviously technological new structure might renew the friendly neighborhood thieves' interest in the place again. (No matter that I haven't left anything of value out there in my absence since they stole my tractor in 2013; they just want to be sure they're not missing out on any new larcenous opportunities.)
However, I do have enough open ground near my little barn for HF Beverages! And, I have a supply of fibreglas rod step-in electric fence posts, and plenty of electric fence wire, and nobody thinks twice about an electrically fenced pen in a farm yard. Plus, if I'm creative in making my terminations easily reconfigurable, I could conceivably connect a fence charger to the array when it's not in use, and thereby make it self-protecting. Mwa-ha-ha! ("The guy's just one lab accident away from being a supervillain.")
At any rate, a question for you about the plot comparing patterns of a single Beverage and a phased pair: was that modeled on yours with a length of 65 m, or some other dimensions?
Thanks.
John
Re: Beverage antenna change
Posted by Bob ZL1RS on December 12, 2015 at 23:09:13.
In reply to Re: Beverage antenna change posted by John Davis on December 12, 2015
Hi John,
Sorry to hear about your tractor theft ... but the electric fence unit connected to an unused HiFER Beverage sounds like 'fun' in case they come back :-)
The modelling of the single vs. pair of Beverages in 4NEC2 was using the same parameters for length (65m), height and termination impedance/radial lengths, and over the same 'moderate' ground conditions. I have never made a physical A/B comparison to see if the reality meets the theory, but the pair do 'go' well.
I did physically compare a single 65m long Beverage against a Flag antenna (half sized version of the W7IUV dimensions) on the 30m band, and found the Beverage was 3 to 8 dB better depending on the time of the evening.
73, Bob ZL1RS 13558.4 MHz Beacon active
Posted by Ed Holland on December 12, 2015 at 23:23:41.
Hi Folks,
At long last, I have a 22m Hifer signal attempting to get out. Frequency is 13558.4 MHz, keyed as a long dash ~1 second, with a slightly shorter silent period - the best output from the bike light keyer.
There is a "chirp" characteristic, which might help distinguish it, if it turns out to be going anywhere at all.
Please listen out and let me know if anything comes your way.
Cheers,
Ed
Loran C 100 KHz
Posted by Bill KB9IV on December 14, 2015 at 14:54:27.
Hi Group Last night at 0200 UTC the 100 KHz Loran C was active bearing from the UP of Mich was 110 degrees ESE.
Bill KB9IV
Re: Beverage antenna change
Posted by Paul on December 14, 2015 at 15:59:10.
In reply to Re: Beverage antenna change posted by John Davis on December 12, 2015
John,
A large (like 0.1 uF at 20 KV) capacitor in series between the end of the beverage wire and the terminating resistor would give you the ability to connect a fence charger when it is not being used as an antenna, and will prevent you from having to walk to the end of the end of the antenna before and after listening sessions.
Almost every directional AM broadcast station has some caps laying around that you could use, sometimes for the asking.
Re: 13558.4 MHz Beacon active
Posted by Paul on December 14, 2015 at 16:02:02.
In reply to 13558.4 MHz Beacon active posted by Ed Holland on December 12, 2015
Copying it right now in Calaveras County.
It isn't very consistent, but occasionally, I get enough to see it on Argo.
Re: 13558.4 MHz Beacon active
Posted by Paul on December 14, 2015 at 16:07:44.
In reply to Re: 13558.4 MHz Beacon active posted by Paul on December 14, 2015
Follow up-
I cannot figure out how to attach the Argo shot to this message. I can email it if you like.
Also, I had to tune the receiver down to 13.55815 in order to get the tone around 800 Hz. My receiver (R390-A) isn't the most accurate thing in the world, but it is somewhat in the ballpark.
Re: 13558.4 MHz Beacon active
Posted by Ed Holland on December 14, 2015 at 18:42:10.
In reply to Re: 13558.4 MHz Beacon active posted by Paul on December 14, 2015
Hi Paul,
Thank you! This is very encouraging. Please feel free to email the Argo screenshot if you have time.
BTW, I intended to add my locator info earlier: CM87vj
Yesterday I did my best to check the signal's escape from the neighborhood, at least to get into the far field away from house wiring etcetera and headed out on the trails near our house. At a mile away, and substantialy above my QTH the signal was still quite audible on a Grundig PE400 portable with it's telescopic antenna. It being not the most sensitive receiver I took this as encouraging. To get a more distant report is just brilliant :)
Best regards,
Ed
Re: Loran C 100 KHz
Posted by John Davis on December 14, 2015 at 19:02:22.
In reply to Loran C 100 KHz posted by Bill KB9IV on December 14, 2015
What happens in Jersey apparently doesn't stay in Jersey. :)
UrsaNav is running experimental "enhanced" LORAN tests from Wildwood, NJ, and some sources online indicate they are likely to be on quite a bit through Spring. Looks like Ol' Doc Frankenstein has hooked up his electrodes to that dead horse.
Re: Beverage antenna change
Posted by John Davis on December 14, 2015 at 19:07:29.
In reply to Re: Beverage antenna change posted by Paul on December 14, 2015
Interesting thought, Paul! I'd probably need to go with a value quite a bit smaller than 0.1 μ or else get a really hefty low-impedance charger, but it ought to be do-able. Thanks!
About Attachments
Posted by Webmaster on December 14, 2015 at 19:32:38.
"I cannot figure out how to attach the Argo shot to this message."
Up to now, all screen shots you see in this board have been added manually because the board software doesn't handle uploads...yet.
I've been experimenting with software that does the job quite nicely, however, and am currently integrating it with the board software. Shortly after the first of the year, I hope to announce a number of changes that will let this board work a little more like a forum, including the ability to attach files.
Meanwhile, anyone who would like a screen shot included in a post can email it to mb here at LWCA, or to my lwcanews address at AOL, and I'll be glad to add it manually.
Alternately, if you already have a place of your own to host files, you can put a URL in your post, and we'll convert it to a live link.
John
Re: Beverage antenna change
Posted by John Davis on December 15, 2015 at 19:27:38.
In reply to Beverage antenna change posted by Bob ZL1RS on December 12, 2015
Bob, I've been meaning to mention something else about the bottom screen capture from 8 Dec that you linked in your post (www.qsl.net/zl1rs/images/multi_2015_12_08.jpg). The trace below RY that you denoted "??" is the DFCW version of SIW, sending "K3SIW" in fact. On the upward side of RY is a faint line that looks as if it has random frequency drift, but in actuality I believe it is the ultra-slow slant-mode version of SIW. If you were able to run a capture at 1/10th the speed you use for QRSS3 signals, over the course of time you would probably see a series of three consecutive upward ramps ("dots"), then two up ramps, and finally one up followed by two down ("dashes"), forming the characters SIW.
I wanted to find one of my own postings showing this, but I discovered I haven't posted many captures in recent weeks. The "newest" one with SIW in it dates back almost two months: lwca.org/mb/msg/5493. In this one you can see the DFCW "K3SIW" clearly, and even the CW ID ahead of the "K" about midway from left to right.
RY was not yet on the air at the time of my capture in that message, but a little higher up is a seemingly perforated line which corresponds in frequency to your fuzzy random-looking line. That's SIW slant mode.
The perforations in my captue are an artifact of unusually strong Doppler shifted multipath reflections that day, on that particular path, which show up in the slower QRSS30 trace (the letter W only) as multiple copies of the signal drifting about in frequency by small fractions of a Hz. Over such a time scale, interesting propagation effects are not uncommon at 2200 m; but most of the time, the slow slant-mode SIW signal does not exhibit so many copies of itself. I'd be very interested in seeing what that signal looks like in a slow capture at your QTH.
John
Re: 13558.4 MHz Beacon active
Posted by Ed Holland on December 15, 2015 at 19:30:15.
In reply to 13558.4 MHz Beacon active posted by Ed Holland on December 12, 2015
"Dash" is still going strong. I made a minor correction to frequency this morning to keep it as close to 13,558.4 KHz as I can determine. Things had drifted a few 10's of Hz
My (anticipated) issue now, is how to listen for other beacons with this one operating so close by. What do other folks do about this? Of course I could turn off for a few minutes, but that is rather contrary to the purpose of a beacon...
Cheers,
Ed
Re: 13558.4 MHz Beacon active
Posted by John, W1TAG on December 15, 2015 at 21:02:55.
In reply to Re: 13558.4 MHz Beacon active posted by Ed Holland on December 15, 2015
Ed,
My solution is easy, but expensive. I live 130 miles away from my RY beacon.
John, W1TAG
Re: Loran C 100 KHz
Posted by Steve ..KQ7E on December 16, 2015 at 02:09:37.
In reply to Re: Loran C 100 KHz posted by John Davis on December 14, 2015
Hi..tnx for the info...stumbled on it tonight at S-6 here in NW Indiana. Do you think that they may have intentions of reviving L-C as a possible back-up or some other scheme ?
Re: 13558.4 MHz Beacon active
Posted by Paul on December 16, 2015 at 05:38:03.
In reply to Re: 13558.4 MHz Beacon active posted by Ed Holland on December 15, 2015
Like John, I also live a distance from my beacon(s). 70 miles as the RF flies to the HiFer.
I just emailed the screen shot of your HiFer from the other day.
73, Paul
Re: Loran C 100 KHz
Posted by Paul on December 16, 2015 at 05:41:32.
In reply to Re: Loran C 100 KHz posted by Steve ..KQ7E on December 16, 2015
100 kc. is still a ghost town in California.
Hate to admit this- I kinda miss the LORAN pounding in here all the time. It was nice to verify the receivers working on LW>
Re: Loran C 100 KHz
Posted by John Davis on December 16, 2015 at 06:26:58.
In reply to Re: Loran C 100 KHz posted by Paul on December 16, 2015
Paul writes: "It was nice to verify the receivers working on LW"
True, but I'm happy enough to use WWVB for that. It doesn't splatter over half the LF spectrum.
Steve asks: "Do you think that they may have intentions of reviving L-C as a possible back-up or some other scheme?"
There does seem to be some notion about that, but I don't really understand as a backup to what, precisely. While eLORAN has much-touted additional capabilities, it can't implement navigation in three dimensions, and it still doesn't quite achieve the precision in 2D that GPS does.
Given that DGPS is supposedly used so little inland these days that the government is currently considering shutting down two-thirds of the network, one has to wonder whether there's any urgent demand that would justify the cost. Hence my reference to electrodes on the dead horse.
John
Re: Reception report of my PBJ Hifer received in New Zealand
Posted by Thomas on December 18, 2015 at 19:55:43.
In reply to Reception report of my PBJ Hifer received in New Zealand posted by Chris Waldrup on December 06, 2015
Wow, great job Chris and tnx to ZL1RS for listening.
---------------
COORDINATES +
TOTAL DISTANCE
Tracy City, US -85.7361 35.2604
Kerikeri, NZ 173.9667 -35.2167
Miles: 8070.14
Kilometers: 12987.28
Bearing: SE
---------------
Re: MP 137 kHz Off Air for Maintenance
Thomas - KV4QT
Posted by mitch VE3OT on December 18, 2015 at 23:36:45.
In reply to Re: MP 137 kHz Off Air for Maintenance posted by John Davis on December 09, 2015
Thanks for the timely capture John...nice signal.. I will be "cleaning up the act" during the holidays and get it back together as soon as possible. Hifers to NE IL
73 and a Merry Christmas
Mitch
Posted by Garry, K3SIW on December 19, 2015 at 17:53:39.
Nice watering hole copy this morning of hifers NC, USC, EH, and RY. Higher up MTI and PBJ were also good copy.
73, Garry, K3SIW, EN52ta, Elgin, IL
WG2XFQ on Christmas Eve
Posted by Mike Terry on December 20, 2015 at 18:21:19.
December 16, 2015
ARRL - the National Association for Amateur Radio - wrote on their Facebook group:
If you have a radio that will tune down to 486 kHz, listen on Christmas Eve as experimental station WG2XFQ takes to the air to commemorate the 109th anniversary of the Reginald Fessenden's first audio transmission. See the complete story here: http://www.arrl.org/news/fessenden-christmas-eve-commemorative-transmissions-set Re: FL moves to wateringhole in DFCW8
Posted by Dave on December 21, 2015 at 23:11:58.
In reply to FL moves to wateringhole in DFCW8 posted by Dave N4EF on November 22, 2015
"FL" mode change: now FSKCW8 followed by 5 wpm CW.
Antenna change: now using dipole up ~ 15 feet cut for 22 m instead of multiband loop.
Dave
Re: GNK Reception Report
Posted by John K5MO on December 23, 2015 at 01:00:14.
In reply to GNK Reception Report posted by Roger V Thompson on November 25, 2015
GNK was clearly audible as well as clear copy on Argo this afternoon here in NC. I sent a report.
Receiver is a TS140 and a 160m Sloper.
HiFer V1RGO
Posted by John K5MO on December 23, 2015 at 22:39:26.
Good copy into the east coast this afternoon. Anyone know anything about this one?
Re: About Attachments
Posted by Doug Williams on December 23, 2015 at 23:58:08.
In reply to About Attachments posted by Webmaster on December 14, 2015
That is good news, John. Attaching files and URL links to a post is the bare minimum functionality for most forums. Glad to see the LWCA is moving forward with this.
Re: HiFer V1RGO
Posted by Dave N4EF on December 24, 2015 at 11:44:27.
In reply to HiFer V1RGO posted by John K5MO on December 23, 2015
Hello John.
Here's a list of hifers to help you:
http://lwca.org/sitepage/part15/index.htm
Dave
SAQ 2015
Posted by Steve Sykes on December 24, 2015 at 13:07:46.
Fairly noisy conditions this morning. SAQ was very weak here but I was able th hear V's about 0750Z and the message which stopped at 0806Z. I picked up characters but not enough to complete the message. Even though it wasn't clean reception, it was my best so far.
Equipment: Harris RF-590A, 14 turn 6 foot loop, homebrew W1VD preamp. My location is FN12gx.
Steve KD2OM RTÉ Longwave 252
Posted by Mike Terry on December 24, 2015 at 14:31:20.
It has been widely reported that RTÉ Longwave 252 will operate until May 2017, with reduced hours in 2016.
Radio France Inter (Allouis) at 162 kHz
Posted by Mike Terry on December 24, 2015 at 14:37:35.
Its possibly closing at the end of 2016 but still to be confirmed.
Re: SAQ transmission on Christmas Eve Dec 24th 2015
Posted by Mike Terry on December 24, 2015 at 14:38:29.
In reply to SAQ transmission on Christmas Eve Dec 24th 2015 posted by Mike Terry on December 12, 2015
Good reception reported in Western Europe.
Re: SAQ 2015
Posted by Steve on December 24, 2015 at 15:10:41.
In reply to SAQ 2015 posted by Steve Sykes on December 24, 2015
Tnx for your report...you were luckier than I was with my JRC-535 & 80 m. OCF ant; no signal evident through an S-3 noise level.
Evidently, your loop + preamp are the secret in vlf reception
Steve , KQ7E
Christmas message
Posted by joe vo1na on December 24, 2015 at 17:34:26.
A special message will be sent QRSS100 137.777 kHz tonight from
VO1NA (GN37). 1000 watts, 4 amps RF to a 100m 'Rotated L'.
73 MX HNY Re: SAQ 2015
Joe VO1NA
Posted by Steve Sykes on December 24, 2015 at 19:22:57.
In reply to Re: SAQ 2015 posted by Steve on December 24, 2015
I also tried with several other antennas, I couldn't hear anything on them. I need to figure out how to rotate the loop, noise is bothersome. Best would be a major power failure over the east coast at the correct time.
Merry Christmas Re: Christmas message
73
Steve KD2OM
Posted by Steve Sykes on December 24, 2015 at 19:42:53.
In reply to Christmas message posted by joe vo1na on December 24, 2015
Stupid question but how do I receive QRSS100? ARGO has 60 and 120, Spectran 60.
73 Re: SAQ 2015
Steve KD2OM
Posted by Frits W1FVB on December 24, 2015 at 20:49:19.
In reply to Re: SAQ 2015 posted by Steve Sykes on December 24, 2015
Was able to copy a few characters. The signal was down into my noise floor. I used an e-field receiver with soundcard and raspberry pi for processing. This year I've copied more the previous years. btw there was a lot of RTTY and CW on 18.1
73, W1FVB Frits in Whitefield, NH FN44ej Re: Christmas message
vbradio.wordpress.com
Posted by Joe VO1NA on December 24, 2015 at 23:27:15.
In reply to Re: Christmas message posted by Steve Sykes on December 24, 2015
QRSS120 should work fine. Good luck!
Re: SAQ 2015
Posted by Steve on December 25, 2015 at 03:55:36.
In reply to Re: SAQ 2015 posted by Frits W1FVB on December 24, 2015
Hi..Tnx for your post , also. It would seem that ,judging from your & Steve S. reports, that you folks on the US East coast did have some luck copying SAQ; suspect that folks further west may not have been able to copy it. My noise floor , when it's good is at abt S-2 / S-3; other times it rises to S-5,6 & greater in the vlf range. Apparently i have some nearby neighbors with horrendous QRM generators.
Marry Christmas !!
Steve ( KQ7E )
Re: SAQ 2015
Posted by John Davis on December 25, 2015 at 04:42:41.
In reply to Re: SAQ 2015 posted by Steve on December 25, 2015
Here in SE Kansas, the static was more like springtime level than Christmas time. Even if I had completed my loop antenna in time, it probably wouldn't have helped. The severe storms last night were fairly far east, but the north end of the line was located right on the Great Circle line toward Sweden.
During brief breaks in the worst of the noise, I could hear a carrier being keyed, but couldn't copy any complete characters.
Argo showed a faint wandering trace of carrier from about 0750 UTC to 0806, ranging from just a couple of Hz above 17.200 to 10 or 15 Hz below at times. I'd like to think that was SAQ because of the time frame, but it's hard to be sure. There were other faint wandering carriers, but this one was the closest to the nominal frequency and wandered the least.
Double path Hifer EH Thursday morning
Posted by Garry K3SIW on December 25, 2015 at 05:05:56.
John,
I shut down my hifers for a pre-Christmas look at hifer activity. At the watering hole found NC, EH, USC and RY coming in as is normally the
case. Up the band MTI was also good but PBJ symbols weren't distinct, presumably due to QSB. What wasn't normal was the double image of EH (see capture). I think such distinct 2-path propagation is what you've seen on a number of sources. At the time of capture, NC and USC were pretty stable but RY had a lot of rapid QSB. EH, in the same general direction but closer, was also pretty stable and the double image persisted for quite awhile.
73, Garry, K3SIW, EN52ta, Elgin, IL Re: SAQ 2015
Posted by Steve Sykes on December 25, 2015 at 13:49:15.
In reply to Re: SAQ 2015 posted by John Davis on December 25, 2015
John, for my curiosity, what type of loop are you trying? My large loop is 14 turns on a 6 foot pvc frame. It is fed with a toroid transformer and 75 ohm coax. I am considering changing it to a one turn loop feed hoping to gain some noise immunity. I also want to add some rotator mechanism.
73 Re: Christmas message
Steve
Posted by Steve Sykes on December 25, 2015 at 13:51:27.
In reply to Re: Christmas message posted by Joe VO1NA on December 24, 2015
A very strong Ho Ho Ho.
73, Re: SAQ 2015
Steve KD2OM
Posted by John Davis on December 25, 2015 at 20:15:08.
In reply to Re: SAQ 2015 posted by Steve Sykes on December 25, 2015
Hi Steve,
The loop I'm working on is (or hopefully will end up being) a single turn square, 20 feet on a side, and suspended with the bottom 10 feet above ground. Coupling wil initially be with a current sensing toroid rated up to 250 kHz, although later I may change that to a balanced-input low-Z amplifier in hopes of including the full long wave spectrum. Given its size, it will not be rotatable--but a fixed 45 degree azimuth gives me a shot at Europe, the Northeast US, and eastern Canada, while rejecting a lot of noise from the Carribean and northern South America, where thunderstorms are not uncommon this time of year.
(If it works well enough, I may build a second one at right angles, which would give me a shot at the Pacific Northwest, western Canada, Alaska and Japan...although probably with the need for a sense antenna and phasing network to cancel the aforementioned noise from the Caribbean. The two loops can also be phased together to give a steerable pattern.)
Construction is with 4" non-perforated PVC drain tile. I was originally going to slap it together with nylon rope for a season or two of use, but as with many of my projects, "feature creep" set in, so it's not yet finished. Might not be done any time soon, either, as I now seem to be coming down with a nice holiday cold, and the weather outside will be turning subfreezing as soon as this weekend's expected floods pass. (Hopefully not before they're gone!)
Here's a rough plan view that I published in The LOWDOWN a few months back:
Re: Loran C 100 KHz
Posted by Bill KB9IV on December 25, 2015 at 23:10:51.
In reply to Re: Loran C 100 KHz posted by John Davis on December 16, 2015
What if DGPS or GPS were knocked out by ol'sol or ol'soviet perhaps it's a back-up.
Best Holidays
Bill
Re: Loran C 100 KHz
Posted by John Davis on December 26, 2015 at 06:00:55.
In reply to Re: Loran C 100 KHz posted by Bill KB9IV on December 25, 2015
A backup perhaps...assuming there were users willing to install a second navigational receiver, the necesary additional antenna(s), etc...but for what? Yes, GPS birds are subject to solar activity and possible attack. We all understand that, and it's worrisome that some users depend on it so heavily despite its current vulnerabilities.
But let's look at the bigger picture: A backup is only a backup if it can do most of the same job as the primary resource, and if it's available at the very time and place where it's needed.
LORAN (even the e-version) lacks the precision required for close-quarters aviation navigation. It can't handle the z-axis at all. It also lacks sufficient range for transoceanic flights.
It doesn't have even the accuracy everyone has come to expect of their car GPS. It's not anywhere close to being useful to surveyors. As for railroad and truck shipping, the inland DGPS network is apparently about to be shut down in three weeks because those industries have stayed away in droves. They don't seem interested in any more positioning accuracy than an impaired GPS fleet could deliver, and they don't seem to need its existing coverage gaps filled by anything. They hardly seem to care the primary resource at this point in time, let alone a backup for it.
If one is concerned about time and frequency synchronization for such things as the Internet, there are other long wave options available that would be far cheaper to implement as a backup.
So, I have to ask...a backup to whom, for what?
Methinks spending further scores to hundreds of millions on LORAN is the long wave equivalent of the Bridge to Nowhere. It's a boondoggle in the making, a giant pork barrel waiting to be opened, with no long term benefit. Consider: If the sun tosses us another Carrington Event, or Big Bad Vlad goes off the deep end and launches an EMP attack, we're not going be needing high tech civilian navigation or mobile broadband for a while anyway!
Think about that; think very hard about it.
On the other hand, our military has continuous need for positioning that's accurate to the location of the nearest bunker entrance. LORAN can't do that. And, it generally won't be available in locales where our forces most need it, anyway. There is simply NO SUBSTITUTE for the precision and ubiquity of GPS in its most critical uses. So to whatever extent humanly possible, it must not be allowed to fail because of foreseeable causes.
Far better, IMO, that our business and political leaders pull their heads out of--er, the sand and spend money hardening the systems we've already got on the ground (better siting of GPS antennas at telco offices and cell towers to resist local jamming attacks, improved communication between CORS sites to detect and notify authorities of suspicious RF presences) and maintaining an adequate supply of spare satellites ready to launch on reliable, proven vehicles.
John
Lowfers this morning....
Posted by Mike N8OOU on December 28, 2015 at 22:13:39.
21:00 UTC; Garry, and interested readers.
Both WM Beacons have been restarted after having spent the past few days in "Lightning Hibernation". With this being a "cold" start the transmission frequencies are little off. The Hifer is quickly adjusting, but the Lowfer PA will remain un-powered until the electronics stabilize. That will likely take several hours.
Thanks for monitoring the bands.
73 de N8OOU - Mike Meek
On 12/28/2015 11:07 AM, Garry wrote: France and Monaco 2016
> A winter storm with freezing rain and high winds is taking its toll on
> lowfer WM. Nothing seen here this morning. But lowfer EAR is doing fine
> and MLS is in there too.
>
> 73, Garry, K3SIW, EN52ta, Elgin, IL
>
>
Posted by Mike Terry on December 29, 2015 at 09:55:36.
Remaining stations on LW in France & Monaco(for 2016)
162 kHz Allouis 2000/1000 kW France Inter
216 kHz Roumoules 1400/900 kW RMC (04.56 – 00.08) Local time
Météo Marine (Weather Forecast for seamen) 20.03-20.10 (Local Time)
on France Inter 162 kHz (Only on LW, no FM/Internet)
(Christian Ghibaudo on WRTH Facebook group) Re: France and Monaco 2016
Posted by Mike Terry on December 29, 2015 at 10:53:49.
In reply to France and Monaco 2016 posted by Mike Terry on December 29, 2015
The Beidweiler, Luxembourg 2,000 kwh longwave transmitter of French-speaking RTL on 234 khz continues.
Hifer change
Posted by Garry, K3SIW on December 29, 2015 at 13:39:51.
For something different decided to add a slow Hell message to the DFCW hifer on about 13555403 Hz. To improve the look of the message on QRSS3 waterfalls, stretched the symbol duration from 9 seconds out to 15 seconds. The very slow low-shift slash code hifer 35 Hz higher remains the same. Checked the power levels recently and the slash code is down about 2 dB relative to the other source. Both are summed and sent to a quarter-wave vertical antenna.
73, HNY, Garry, K3SIW, EN52ta, Elgin, IL
Czech 270kHz to close
Posted by Mike Terry on December 29, 2015 at 15:57:14.
Dan Goldfarb on mwmasts list reports that 270kHz Uherské Hradiště - Topolná and also various Czech AM stations will close 04 January 2016
"This news coming from Cesky Rozhlas is a complete surprise. Dr Hansjörg Biener quotes the official website in his article written today on Ydun's MediumWave Info.
(via WRTH facebook group) Re: France 2016
Posted by Mike Terry on December 29, 2015 at 18:51:35.
In reply to Re: France and Monaco 2016 posted by Mike Terry on December 29, 2015
Actually the header should just be France, RMC does not broadcast from Monaco.
Re: France 2016
Posted by Mike Terry on December 30, 2015 at 12:48:43.
In reply to Re: France 2016 posted by Mike Terry on December 29, 2015
Radio France has also announced that it will reach a decision of whether or not to keep longwave broadcasting by Dec. 31, 2016.
www.radioworld.com/article/radio-france-to-cease-medium-wave-transmission/277796
potrzebie