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01 Jan, 2018, about 2238 UTC, Tom S in the HFU Ryver chat commented on hearing an odd set of pulses or dits on multiple frequencies in the 40 meter ham band.  I looked and sure enough, there were 4 frequencies with short duration dits on them, and a pretty strong signal is was.  Eventually using remotes and talking to other listeners in chat this signal was heard from the US west coast and Pacific North West to Eastern Europe.

Each frequency was pulsed once per second.  Each pulse or dit was about 20 millisecond long.  The initial set of frequencies was 7035 kHz, 7040 kHz, 7065 kHz, and 7105 kHz.

Looking closer showed that the pulses on all 4 frequencies were not transmitted simultaneously, rather the pulses were sequencing or cycling through the 4 frequencies.  Frequency 1, then freq 2, then freq 3, then freq 4, and back to freq 1 to start the cycle over.  Each 20 msec pulse was followed by 20 msec of dead air before the next frequency in the set transmitted.

In the first set noted, active from 2238z until 2250z, the sequence was 7065 kHz, 7040 kHz, 7035 kHz, and 7105 kHz, in that order.  Back to 7065 kHz to start the cycle again.

This picture shows the timing relationship between 7065 and 7040 kHz in that first set.

At 2250 UTC the frequency set changed, and now the sequence was 7066 kHz, 7040 kHz, 7000 kHz, and 7070 kHz.

At 2323z the signal went off air for a minute, and came back on at 2324 UTC, now with the sequence of 7065 kHz, 7040 kHz, 7105 kHz, and 7000 kHz.  This set continued until 2355 UTC.

At 0005 UTC, now 02 January, the signal came back with the sequence 7065 kHz, 7040 kHz, 7105 kHz, and 7120 kHz.  At 0016 UTC this frequency set changed to 7065 kHz, 7040 kHz, 7010 kHz, and 7105 kHz.

The signal went off air at 0019 UTC and was not seen again.

Note that in the 5 sets of frequencies observed 7065 and 7040 kHz were always the first two used, the last two frequencies changed with each set.

Both while the signal was active and for several hours after it ended I attempted to find it on other freqs, I did not see any active.

These pulses were 1 pulse per second per frequency and the timing appeared very stable over the hour and a half observed.  The lead pulse, always 7065 kHz, always arrived at my location about 9.6 msec after UTC time zero.  Although there is really nothing to indicate it (and nothing to NOT indicate it), if we assume the lead pulse is made on the start of the UTC second then we can plot, based on propagation time, the range from my location.  This results in a range ring looking something like this:


Pure speculation, and nothing to prove it either way.  But interesting how the circle goes right through WLO's location in Mobile, AL, as well as near a few other known radio sources near the Great Lakes.

Anyway, I have no idea what this signal was / is used for, and it might be just some kind of test signal.  But I found it interesting and it was, in my opinion, well over ham power levels.  I will be keeping my eyes open for it.

I made a video of the signal and put it up on my YouTube channel.  The video is boring with lots of text added carrying the details.  There are sections of the video for each of the 5 sets of frequencies seen and audio comparing the timing of each frequency set.  So not something to keep the average YouTuber engaged, but maybe someone interested in shortwave oddities might find it revealing.



North American Shortwave Pirate / KMUD 6906.1 AM 0047 UTC 1 Jan 2018
« on: January 01, 2018, 0053 UTC »
So far UNID on 6906.1 AM.  Noticed it about 0047 UTC, 12 Jan, 2018.  Music.  Prince, "You don't have to be rich", is the name of that song "Kiss"?

Very weak here, occasional peaks enough to make out audio.

(edit)  KMUD ID in CW at 0106 UTC.  Came up nicely about this time, pushing S7 to S8.


UNIDed station with music noted at 0154 UTC, 20 Dec, 2017, on 6942 kHz LSB.  At first I thought it might be Peskies playing music, but then an SSTV went.

In general too weak to make out much other than is music, maybe Christmas songs, not sure.

(edit)  While I never heard a callsign on air the callsign of the SSTV image, not seen on the image but sent as an ID that MMSSTV displayed, was "YETTI MAN".


Other / MOVED: 6398,50 CW
« on: November 03, 2017, 2307 UTC »

HF Mystery Signals / MOVED: 6398,50 CW
« on: November 03, 2017, 2304 UTC »

So far UNIDed station 6925 AM.  S9 or so, audio is a little low but has improved during the program.  I think I saw this station tuning up before it came on with audio.

2348z  What You Won't Do For Love, Bobby Caldwell
2350z  You Needed Me, Anne Murray

Off suddenly at 0000z.  Just before leaving the air I heard some squealing in the audio, like SWR or RF in the audio issue.  Before it left the air the audio was starting to be very nice.  Good audio bandwidth.


Spy Numbers / MOVED: P5O 3.635MHz CW???
« on: July 11, 2017, 0121 UTC »

Spy Numbers / V07 July 09 2017
« on: July 09, 2017, 1519 UTC »
V07 on July 09, 2017

13563 kHz USB, 09-07-2017 0700, 512 512 512 000
12163 kHz USB, 09-07-2017 0720, 512 512 512 000
12163 kHz USB, 09-07-2017 0724, 512 512 512 000

Note the unusual repeat on 12163 kHz at 0724z.  This was also at a significantly lower power level, so not sure what was going on there.  The 0720z TX was S9 or a little over, the 0724 was S7 and lower.

The voice has changed as of last week from what it has used for the last 5+ years.  It sounds fuller and the tempo has been sped up a bit.

Recording here, left channel is the null message sent on 12163 kHz USB, July 09, 2017, right channel is the null message sent on 12182 kHz USB, July 12, 2015.

And a spectrogram here, pointing out some changes to the voice.

There has also been a frequency change starting this month, deviating from the frequencies used in July since at least 2011.  It will be interesting to see if all of the freqs, for all months, have also changed.  Last month was on the old freq sets.

Old freq set here:

But so far this July they have used 13563 khz and 12163 kHz, instead of the XXX82 kHz freqs they used previously.


For the last couple of days I have been looking at a signal that has some of the earmarks of HAARP.

Starting about 2130 UTC on May 21 and 22, 2017, what appeared to be a dead carrier came up on 5125 kHz.  The carrier transmitted on a 3 minute cycle every 10 minutes.

On May 21 it came up at XXX7:00z and off at XXX0:00z.  I mean for example, the carrier started at 2337:00z and stayed on the air until 2340:00z.  Then it was off air until 2347:00z, and transmitted until 2350:00z.  Then on at 2357:00 and off 2400:00.  Etc, etc, 3 minutes every 10 minutes, starting on the XXX7:00 mark.  It did this from about 2130 UTC on May 21 until about 0750 UTC on May 22, or roughly 10 hours of operation.

Further, there occasionally appeared to be some very low frequency modulation on the carrier, for example at 0400:00z - 0403:00z tonight it had swept modulation on it, starting at about 15 Hz and going to about 23 Hz, or possibly half those frequencies and I was seeing the harmonics, although most of the time all I could detect was a little 120 Hz hum (which I have seen on HAARP before.

And then on May 22 at about 2130 it started up again.  Still on a 3 minute on per 10 minute cycle, but tonight it starts at XXX0:00z and ends at XXX3:00z.  I mean it starts on air at 0020:00z and goes of air at 0023:00z, then back on the air at 0030:00z and off at 0033:00z, etc, etc.

Right now (0400 UTC, May 23) the signal is still cycling.

I have seen these kinds of signals for the last few months, off and on, but never really looked at them closely until yesterday.  By the way, these signals are heard on remotes across the US and in Europe.

Why do I say this might be, maybe, to be considered, HAARP?  The signal strength and characteristics are consistent with past HAARP observations.  The bearing of arrival is consistent with past HAARP observations.  The low frequency modulation is consistent with past HAARP observations.  And finally the 120 Hz hum is consistent with past HAARP observations.  Not one of these things, by themselves, is a good indicator, but taken together I think it is worth considering HAARP as a possible source.

Chris, if we had the GPS DF thing going we could tell ;)


(edit)  Added screenshot;

The following is a screenshot of about 35 minutes of waterfall looking at signal in detail.  4 transmission cycles, every other transmission has low frequency modulation on it.

(additional edit)  Further information;

At 0600 the transmissions changed.  It was still the 3 minutes per 10 minute cycle, however now the 3 minute transmission was broken up into a 3 second on and 1 second off cycle within the 3 minutes.

Also noted that alternating 3 second cycles were stronger and weaker, and the strong ones appeared to have the VLF audio modulation on them.  This lead to a closer look yet, and I now believe that every transmission may have the VLF audio on it, however I was not initially able to detect it on the slightly weaker ones.  At a guess, HAARP was alternating X mode and O mode operations, as the power delta between the strong / less strong transmissions is about equal to the delta observed between confirmed X and O mode operations.

In past confirmed HAARP operations O mode was about 10-12 dB stronger than X mode, and that tracks with these observations.

HF Beacons / Windy 4102.74 kHz 1300 UTC May 20 2017
« on: May 20, 2017, 1323 UTC »
The newer format Windy beacon is booming this morning, 1300 UTC, May 20, 2017.  4102.74 kHz but with some sag, so I expect it will drift with either temp or battery voltage.

No wind in the High Desert this morning, no dits between the W's, it is sending:
TMP 74
B 127

Entire cycle takes about 1 min 31 seconds.

You can tell when the sun hit the sensor, temp shot up 6 degrees in under 5 minutes.


Some kind of odd digital image mode on the waterfall, 0330 UTC, 20 May, 2017.  Freq was about 6960 kHz.  Unfortunately I was not recording when it happened.


Other / HAARP testing, 0110 to 0433 UTC, 20 February 2017
« on: February 20, 2017, 1521 UTC »
For the first time in a while HAARP was active in the early morning hours (UTC) 20 February 2017.  This activity was preannounced on the HAARP web page as well as several associated Twitter and Facebook accounts.

The official HAARP Facebook account ( https://www.facebook.com/UAFHAARP/ ) was not very useful in real time, however near real time updates were happening on the Twitter account of an assistant research professor ( https://twitter.com/ctfallen ).

A quick breakdown of the HAARP transmissions for early morning, 20 February, 2017, as received at my location:

~0110 to 0200 UTC, active on 4440 kHz with CW.

0207 to 0236 UTC, active on 3350 kHz.  Burst sent every 30 seconds.  Burst length is 4 seconds and consist of 15 short pulses at 5 pulses / second followed by one, one second long pulse.  HAARP system was apparently in X mode during this time.

0239 to 0259 UTC, active on 2800 kHz.  Same signal as 0207 to 0236 on 3350, 15 short pulses and one long pulse in a 4 second long burst sent every 30 seconds.  Still apparently in X mode.

0300 to 0342 UTC, Using both 2800 and 3300 kHz at the same time in Luxembourg Transmission tests.  This series involved different audio being sent in AM mode, sometimes tones, beeps, and music.  This was a 9 minute and 30 second cycle repeated every 10 minutes, so there were 4 complete cycles during this time period, one starting 0300, the next 0312, next 0322, and the last starting at 0332 UTC

0343 to 0433 UTC, Sequencing 2800, 2820, and 2840 kHz, CW on each, Artificial Aurora test.  Transmissions 90 seconds long on each freq, off air for 30 seconds, and then to the next in the cycle.  Sequence was 2800 kHz in X mode, 2800 kHz in O mode, 2820 kHz in O mode, 2840 kHz in O mode, then back to start of sequence.

Keep in mind that when I use CW above I do not mean Morse code, rather I mean CW as defined by RF types not in communications, CW is Continuous Wave, and simply means an unmodulated carrier.


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