We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Token

Pages: 1 ... 6 7 8 9 10 11 12 13 [14] 15 16 17 18 19 20 21 22 ... 146
196
HF Beacons / Re: New dasher beacon at 7999.10?
« on: December 11, 2020, 0123 UTC »
I would think it might be this one:
https://www.youtube.com/watch?v=AQIl2Zdr-lo

I saw that one about 4 or 5 weeks ago, and mentioned it here in another thread, but did not start a new thread about it.  I don't know how many others have seen it to date, but I don't think it is seen or heard much.

T!

197
HF Beacons / Re: New Dasher 4097.22 KHz ?
« on: December 10, 2020, 1821 UTC »
I would assume that is this one (  https://www.hfunderground.com/board/index.php/topic,74397.msg247748.html#msg247748  ).  I have seen that dasher at night though, so I do not think it is solar powered.

T!

199
HF Beacons / Re: New whooper beacon on 4095.6
« on: December 05, 2020, 1411 UTC »
Since it went to this new format it has been very weak here at the house.  I can, sometimes, see it and hear it, but just right at and in and out of the noise floor.

T!

200
HF Mystery Signals / Re: Natural phenomenon?
« on: December 01, 2020, 1447 UTC »
No, this is not natural, this signal is a type of ionosonde called a chirp sounder.  And yes, they are propagation monitoring tools.  They start from some defined frequency and transmit continuously (sometimes except for specific skipped frequencies, which vary per installation) to another defined frequency.  For example, it might start at 5000 kHz and chirp up to say 28000 kHz, at 100 or 150 kHz per second.  In one example, 5000 kHz to 28000 kHz at 100 kHz / sec, it would take about 230 seconds, just under 4 minutes, to make the entire sweep.  Since the target set is the ionosphere, and that is pretty slow to change, it does not have to do this very often, a few times an hour is enough to keep up with changes.

It absolutely can be thought of as a radar for tracking what is going on in the ionosphere.  And there are dozens of these scattered around the World, so you often can hear two or three zipping by a given frequency in just a few minutes.

T!

201
HF Beacons / Re: New whooper beacon on 4095.6
« on: December 01, 2020, 0431 UTC »
The DW Whooper changed it's "whoop".  ;D

It now sweeps low to high with the very first whoop going from 4095.65 to 4096.35 and the next 21 whoops from 4095.65 to 4096.25 KHz. The sweep is a bit more linear and no longer has that "fishhook" look.


The CW ID of "DW" is still at the low end at 4095.65

Coming in S3 on the KFS Kiwi SE radio

Yeah, I noticed that.  I grabbed some SDR recordings of it right after it changed and will do a new video sometime this week.  I also noticed the ID has a small whoop on the entirety of the letter D that was not present before.

T!

202
Spy Numbers / South Korean V24 may be inactive since late Sep, 2020
« on: November 29, 2020, 2346 UTC »
I have not been doing much radio stuff recently, but I have been doing my scheduled and programmed recordings and spectrum captures.  Those go on automatically as long as the hardware is turned on, and it has been on 24/7 even if I have been doing other things.  For V24 I capture and chart signal levels on all known past V24 freqs, including freqs they have not used in years, and record IQ files of scheduled transmission windows plus a bit more spectrum just in case.

Today I sat down to update the V24 schedule, which I last updated in March of 2020.  To do that I basically played back all the recordings and spectrum captures since March during the time period of 1000 to 1700 UTC daily.

It turns out V24 has not transmitted, to the best of my knowledge, since late September.  In September V24 made two of its nine schedules, or 6 of a possible 27 transmission.  It transmitted on 6215 kHz, on days 5, 7, and 9, at 1500 UTC each day, and it transmitted on 4900 kHz, on days 23, 25, and 27, at 1530 UTC.  So the last V24 transmission I am aware of was September 27, at 1530 UTC, on 4900 kHz.  And for several months prior to that it was at a much lower than normal rate of activity.

Of course there are several possibilities, the simplest is they may have shifted to a new schedule with new times and frequencies I have not captured.  Or they may have just taken one of their unexplained pauses.  In 2015 V24 did not transmit from 16 June to 26 November, one theory is that they changed transmitter facilities during that time period.

So, is V24 gone?  Or is it just taking a rest?  Or did COVID slow it down?

T!

203
Utility / Re: S/S Time station 10000 AM 2249 UTC 24 Nov 2020
« on: November 25, 2020, 1307 UTC »
At a guess it is station LOL, Buenos Aires, Argentina. 

T!

204
Utility / Re: OTHR? 13.400
« on: November 25, 2020, 1256 UTC »
Although typically people just call this CODAR, there are actually CODAR and WERA found in that section of spectrum.  And yes, CODAR and WERA are both radars that work over the horizon, but generally when you say OTHR people picture military radars or radars designed to track aircraft, ships, or missiles.  So for my logs I do not call these OTHR, rather I call them Coastal Radar.

T!

205
HF Beacons / Re: New whooper beacon on 4095.6
« on: November 24, 2020, 1625 UTC »
I just got this here at the house for the first time, and I have looked pretty often since it was first reported.

1620z, 24 Nov, 2020, peaking up to S3 and fading in and out of the S1 noise floor here, so a bit of QSB.

T!

206
S8 to S9 into the Mojave Desert of California tonight.  House sound system is rocking so the wife can enjoy.

T!

207
HF Beacons / Re: New whooper beacon on 4095.6
« on: November 17, 2020, 2225 UTC »
No real idea about the new dasher, other than I first saw it about a week ago.  At times it is very strong here, other times unheard at all.  It seems that I hear it best about an hour after local sunrise.  At first I thought it was night time only (I did not see it in daylight for the first few days in a row), and that it might be related to the other new dasher on 7999.2 kHz (they have the same or very similar cycle times), and thought maybe shifting daytime/night time freqs.  But then I saw the 4097.2 during the day, and have seen it pretty much every day since.  However, I have not yet seen 4097.2 and 7999.2 at the same time, so they still could be related.

T!

208
HF Beacons / Re: New whooper beacon on 4095.6
« on: November 17, 2020, 0308 UTC »
No sign of DW here, and I was looking about the time you posted.  I do, however, see, the assumed new 4097.2 beacon (2 sec on, 2 sec off) fading in and out.

T!

209
HF Beacons / Re: The new "L" Beacon
« on: October 17, 2020, 1358 UTC »
I ran into this beacon, or I assume it is the same L beacon, on 4102.39 kHz today, just below Windy.  Since I have not checked the beacons in several months I have no idea how long L has been on this freq.

T!

210
I am sorry I missed this.  Was busy so not at the radios, and the recordings show only the weakest of traces, but if I had been at the radio I could have turned an antenna around to peak the signal.

It was not Travis on the mic, was it?

T!

Pages: 1 ... 6 7 8 9 10 11 12 13 [14] 15 16 17 18 19 20 21 22 ... 146
HFUnderground Mug
HFUnderground Mug
by MitchellTimeDesigns