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Topics - Token

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HF Mystery Signals / MOVED: UNID 8993 KHZ
« on: July 17, 2018, 0224 UTC »

HF Mystery Signals / MOVED: 6666.66 KHZ UNID CW
« on: July 02, 2018, 0022 UTC »

HF Mystery Signals / Merging all 1 PPS pip / pulse / tick logs
« on: June 23, 2018, 1311 UTC »

On page 1 of this forum there are 14 different posts about the same signal on different frequencies.  In an attempt to clean things up, and so other things don't get lost between, I am going to move all the 1 PPS pip posts to this thread.

It would be nice if we could keep posts related to these signals in a single thread (or maybe two of them, one for reports and one for speculation / theorization), makes it easier to find information.

Keep in mind this is not the same as some other Pip/ditter posts, such as the multi frequency Pips Network.  This is a thread for the 1 pulse per second, 16 msec per pulse, pips that sound something like a time station.


So far UNIDed station, 6949.47 kHz, AM mode.  Wide and clean audio, about 10.2 kHz total width in AM.  Noticed it about 0346 or so with a carrier,a nd a minute or so later heard the audio.  S9+ into the Mojave Desert.

(edit) ID at 0405 as Solar Centric.
(edit)  Off at 0414 UTC


HF Mystery Signals / MOVED: 11015 USB
« on: June 21, 2018, 1601 UTC »

HF Mystery Signals / MOVED: UNID 9059.85 USB
« on: May 02, 2018, 1207 UTC »

Spy Numbers / Spy Numbers database, a resource you should use
« on: March 11, 2018, 2121 UTC »
For those of you not familiar, Chris has a long standing searchable database you can log your numbers station reports in.  The link is here:

It is a great resource for historical numbers station activity.  When people log to it regularly it can be used to predict schedules.  In the past that was a huge plus, today with several groups keeping good, and current, schedules online this feature is not quite as important as it was.

And if you log to the DB you can select to have your logs submitted to the Spooks mailing list, sharing with other listeners interested in numbers stations.

This DB really only works if users populate it, so give it a look, give it a try.  The more people who use it the better it will be.

And so there is no misunderstanding, I love seeing the activity on this forum, the recent increase in reports is awesome.  I am not suggesting reporting to the DB instead of here, rather it would be great to see them both used.  The DB is awesome and searchable, while the forums promote discussion.


So far UNID station, a couple of comedy skits, one about Feringi Beverage antennas and one about Pee Wees playhouse (too obvious to be a connection?)

Decent signal, S6 to S8 in the Mojave Desert

(edit) started music at 0320 UTC


Other / Unknown dasher, 5136.5 and 6861.5 kHz, 25 February, 2018
« on: February 25, 2018, 1631 UTC »
For the past few days I have been following an unknown dasher that uses two frequencies (but not in the same time periods), 5137.5 kHz and 6861.5 kHz.

I stumbled on this dasher Feb 18, 2018, on 5136.5 kHz, at about 1400 UTC.  The dash is about 1.5 seconds long and occurs about every 26 seconds, it was reasonably strong, on the order of S8.  At the time propagation supported the probability that the source was Pacific or Asian, antenna bearings indicated the same thing.  I looked around for other active freqs and found none, as near as I can tell the dash was on only 5137.5 kHz at the time.

On Feb 19 I noted the signal left the air at 1501 UTC.

On Feb 24 at 1515 UTC I found the same dasher on 6861.5 kHz.  I monitored it off and on, checking back every 15 or 20 minutes, until about 1830 UTC, when propagation faded out with the signal still active.

Today, Feb 25, I saw the 5136.5 kHz signal as soon as I turned things on at about 1150 UTC.  It went off air at 1500 UTC.  I did not find it on another freq after that, although I continued to look for it, off and on, for the next hour.

At various times I thought it looked like some kind of texture on the dash, but not any specific modulation I could ID, more like a click inside the dash at times.

I have no idea what this signal is about.

I have heard it on remotes from Russia to the Rockies, so it is not a pirate or hobby dasher.  I have only seen it active on one frequency at a time.  I have not see anything outside these dashes on the same freq with the same propagation characteristics, so it does not see to be related to other activity.


Utility / HF-GCS playing with the date, Feb 14, 2018
« on: February 14, 2018, 1439 UTC »
The HF-GCS network is not really something I pay a lot of attention to.  After a few EAMs and Skykings it can get pretty boring waiting for the odd phone patch.  However, I  do occasionally tune to it just for grins, and I often end up recording messages on HF-GCS in the process of grabbing spectrum for other purposes.

Such was the case with the first Skyking of the day at 0453 UTC on Feb 14, 2018.

Now you don't think that code word was an accident, do you?

With that said, many years ago when I was active duty, we used a hand coded message format very similar to EAMs for certain types of communications.  We periodically had to practice using this format, as it was somewhat cumbersome.  A friend of mine, who I had grown up with, was on watch on another ship on the HF net.  We transferred multiple messages back and forth in about a 30 minute time period, from 30'ish characters to over 120.

I am sure if any hobby listeners had heard us, and who knows, maybe some did, they might have wondered what all this "high priority" coded traffic was.

What were we discussing?  Why of course, what bar to meet at in Olongapo.


Spy Numbers / MC03, 4990.5 CW, February 10 2018
« on: February 10, 2018, 1626 UTC »
What appears to be MC03 (a Morse sister station to Chinese VC01) has been active off and on for the last few days on 4990.5 CW.

I actually saw this station several days ago, but all it was sending was U34D, which I have listed for a different station.  But 3 days ago it started sending traffic consistent with MC03.


HF Beacons / Morning MX run, 3 February, 2018
« on: February 03, 2018, 1432 UTC »
A quick run through the MX Russian single letter beacon freqs this morning:

3594.0  C
3594.1  A
3594.2  F

4557-4558 beacons covered by jammer

5154.1  A
5154.3  K
5154.4  M
5154.8  F   Wrong freq?  Very raspy, several audio harmonics on 100 Hz steps +/-

7039.1  A
7039.4  M

8495.1  A
8495.4  M

I really need to put up a video of F, K, and M on the lower freqs.  Every time I try to correct the Wikipedia entry on Single Letter Beacons to include these someone comes around and claims I can't point to a published source that corroborates their operations on these freqs.  When I tell them "sure, but I hear them there" I am told that is not good enough.  So I guess I need to "publish" a video and put that to bed.


Spy Numbers / VC01 transmitter changes in mid transmission
« on: January 15, 2018, 0247 UTC »

I put up a video today of Chinese oddity VC01, the Chinese Robot.  There are lots of videos of VC01 on line, however this one shows a specific feature of VC01 that I have not seen other videos address.  This is not new, VC01 has done it for years.

Occasionally you will hear VC01 make a noticeable change in its transmitted signal in mid transmission.  The signal may abruptly change in signal strength, or it might shift frequency slightly, or maybe the transmitted bandwidth will change.  It is easiest to notice when it does all 3 of these at the same time.

I have also noticed, using remote receivers, that sometimes a reduction in signal at my location correlates to an increase in signal at someplace else.  Remember, this is not fading or conditions, it is instant, like throwing a switch.

It might make sense that they cycle through various antennas, and possibly transmission bearings, to insure coverage over a wider area.  But to me, because of the sometimes associated frequency shifts and bandwidth changes, it clearly looks as if they are not only changing antennas, but maybe also changing transmitters.

This leads to a few questions in my mind.  Could this be a distributed network of transmitters?  If not distributed, why change transmitters but stay in the same mode on the same frequency?

Anyway, to the video.  The video is made from recordings of two different receptions of VC01 at my location, more than a year apart.  I have several other recordings showing similar activity, I just chose these two because the changes were fairly pronounced (many times it is harder to detect) and to show it was not a one time thing.

The cycle takes about 6 minutes to complete.  Most of the time I have seen this it has taken about 6 minutes.  To avoid a 40 minute video I have jumped ahead in time to show the changes and 10 seconds before and after each change.

The video is here:


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