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Author Topic: "Sonar Ping", 7631.5kHz  (Read 1855 times)

Offline caylorman

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"Sonar Ping", 7631.5kHz
« on: March 21, 2020, 1602 UTC »
All,
    I recorded this unusual signal on 7631.5 kHz at 18:58 UTC on 20 March 2020.  The only thing I can describe it as is a sonar ping.  It's a repeating series or short pips that descends in volume like an echo.  Just posting it to see if anyone has heard anything like it before, or could tell me is this is an actual digital signal or just some local QRM.

https://soundcloud.com/e-j-caylor/20-mar-2020-18h58m04sz-76315-mhz-usb/s-cAIIJwanPKb

Caylorman
Generally recording from Northeast Indiana
Kenwood TS-570D, SDRPlay RSP2, 107' longwire @ 30'
QSL's appreciated, caylorman@gmail.com

Offline Josh

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Re: "Sonar Ping", 7631.5kHz
« Reply #1 on: March 21, 2020, 2008 UTC »
A weird one for certain, never heard before by me as well.
Radar, sounder, lid playing with an amp pecker or adjusting his bug, who knows.

https://www.qsl.net/ei7ba/Woodpecker.htm
https://www.youtube.com/watch?v=wyzsjqI9-OY
We do not encourage any radio operations contrary to regulations.

Offline blw

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Re: "Sonar Ping", 7631.5kHz
« Reply #2 on: March 21, 2020, 2312 UTC »
That's and interesting one, for sure. Thanks for the audio sample. It's a good audio file.
All logs made from my own SDRs, boatanchors, and antennas
QTH: vicinity of Auburn, Alabama

please eQSL to: slowrollsandloops@gmail.com (thank you)

Offline Token

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Re: "Sonar Ping", 7631.5kHz
« Reply #3 on: March 22, 2020, 0247 UTC »
I have heard a very similar signal from a stuck automatic antenna tuner.  Not saying that is what this is, I don't know what it is, but it sounds similar to that stuck tuner.

It is about a 70 msec cycle (~30 msec on, ~40 msec off), or about 14 pulses / sec.

T!
T!
Mojave Desert, California USA

 

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