HFU HF Underground
Loggings => Other => Topic started by: Dag on July 19, 2014, 0500 UTC
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Please listen to the short 9 second audio clip. What is that signal?
I've heard this sound for years. This one was recorded on 7657 khz, but it occurs all over the HF spectrum I think.
One thing about this particular recording is that the tone changes slightly with each burst -- something I've not noticed before.
Dag
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Sorry I can't tell you what it is but I have wondered what it is since the 1970's when I first noticed it myself... sounds like using sand-paper kinda sorta...
Maybe someone else on the board knows what it is....
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This is the Panther-H Frequency Hopping system, there are 8 pulses in the SOC (you appear to have captured the last few of the 8).
T!