HFU HF Underground
Loggings => HF Mystery Signals => Topic started by: UncleJohn on October 10, 2022, 2318 UTC
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(My notes from Sat. night, local): " 0255gmt., All over the G. D. place...WTF/Hell is This?! "Cold War WoodPecker 2.0"?!! F This! Just caught Woody around 6.935usb/rrty/cw modes. "Whistle/Clicking" "sorta rata tat tat (the best description moi can come up with).
(The following from Sunday night, local): 0055gmt., "4.010, 4.045, 4.515, 5.055, 5.090, 6.100, 6.818 (moi skippin' randomly thru the bands), 6.910, 6.945, 7.415, 8.055,... again Whistle/Clicking"! Oh almost forgot, I double checked on my Grundig...there too! So can't be moi's R8B "Bitin' the Dust" (phew!)
Dare I Say It?: ??? Let's Hear It People! >:(
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You don't want to know and if you did you'd wish you didn't.
:D
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Russian "Container" OTHR auxilary mode (believed to be propagation test sounder) sounds like Woodpecker and does frequency hopping.
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Russian "Container" OTHR auxilary mode (believed to be propagation test sounder) sounds like Woodpecker and does frequency hopping.
(My notes from Sat. night, local): " 0255gmt., All over the G. D. place...WTF/Hell is This?! "Cold War WoodPecker 2.0"?!! F This! Just caught Woody around 6.935usb/rrty/cw modes. "Whistle/Clicking" "sorta rata tat tat (the best description moi can come up with).
(The following from Sunday night, local): 0055gmt., "4.010, 4.045, 4.515, 5.055, 5.090, 6.100, 6.818 (moi skippin' randomly thru the bands), 6.910, 6.945, 7.415, 8.055,... again Whistle/Clicking"! Oh almost forgot, I double checked on my Grundig...there too! So can't be moi's R8B "Bitin' the Dust" (phew!)
Dare I Say It?: ??? Let's Hear It People! >:(
@minorukun, However, the Russian 29B6 Container sounder (I think that is the signal you are talking about) does not go low enough to be the signal he is reporting, it bottoms out at about 6000 kHz. But yes, the Container sounder sounds rather Woodpecker'ish if you are tuned in AM mode, it sounds nothing like the old Woodpecker if you are in any other receiver mode, USB, LSB, CCW, etc. It uses a completely different modulation technique (FMOP vs pulsed), and other than being about 10 Hz it just is not the same in any other way.
Also, at that time of night (0055 GMT and 0255 GMT), at his location, I don't think he would be hearing the Container or its sounder, it just is not heard on the US west coast at this point in the cycle. A year from now it will be more common, right now it is not.
@UncleJohn, an audio or video recording would really help. The most probable answer, based on time, location, and description, is the Australian JORN, or the US ROTHR (AN/TPS-71), but without a recording it is all just a guess. I would lean towards US ROTHR. One of the problems is that, other than being a pulse sound in AM mode, neither of those really sound anything like the Woodpecker. In addition to different modulation types (FMCW vs pulsed) they both typically use PRFs (now fast you hear the pulses repeat) significantly faster than the old 10 Hz Woodpecker when in hopping mode.
When you hear / make a recording of a radar, or what you think might be a radar, the best receiver mode to use is SSB (either USB or LSB) and the widest filter you have. I am assuming a traditional radio, not an SDR, with an SDR you set the filter width to encompass the full width of the signal on a waterfall. Note, and report, which SSB mode you use (I almost always use USB, just because), as which used can make the signal sound different. Use of SSB yields the most data / complete description. For example, it typically makes modern radars sound more like "tweeps" than pulses or ticks, since they pretty much all use some kind of linear FM modulation.
T!
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Token: Thanks for your info. I access the internet Exclusively (100%) @ the public library. I have Zero way to record audio/video & post for your evaluation. Again, Thanks for your input. 8) Still Summer!
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Token: Thanks for your info. I access the internet Exclusively (100%) @ the public library. I have Zero way to record audio/video & post for your evaluation. Again, Thanks for your input. 8) Still Summer!
UncleJohn, if this was the US ROTHR, or the Australian JORN, that you heard, each has a distinctive, and different, pre-beep. With the US ROTHR, when listening in SSB mode you may hear a long-short-short burst before the sweeps of the radar actually start. Kind of sounds like the letter U in Morse code. With the Australian JORN you will hear a similar, but different, burst, it will be a single long tone, like a Morse code letter T, before the sweeps of the radar start.
Not every burst with start with these pre-tones, but if you listen long enough you should hear one.
T!
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What I Have been hearing began last weekend. I have Never heard the likes of these B4! Period. Last evening my local time...there they were, even in the 15 megahertz region! Again Mister Token this is something New. I've been around a while, heard lots of stuff in my over 60 decades of radio listening. Excuse my rant.. I'll probably regret it later..."Or maybe Not" (quoting Stewie Griffin).
Someone out in the hfunderground listening & posting world can help figgur this one out. I am for sure! 8)