Quote:
Originally Posted by russell_w_b
Isn't this what the Soviets used for their HF jamming of the BBC World Service?
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No. The Soviet jammers were of at least three types. One was what sounded like a diesel engine (and probably was!), one was noise, but another was more sophisticated; it was their domestic Mayak channel (sort of equivalent to BBC R2) with distortion and echo.
They'd discovered that psychologically, it was much harder for the brain to unscramble a wanted signals if it was masked with the same language but distorted and echo applied. They could also give the feeble excuse that it wasn't 'deliberate interference' but a transmitter fault!
All the Soviet jammers also had a Morse ID superimposed on them so jamming HQ knew which jamming stations were operating.
Jammers operating in the Middle East sounded like seagulls, there were (are?) wobble jammers, then there are the fantastic Chinese "Firedrake" Jammers (
audio) that go on for hours!
The backwards whale is an odd one. Audio
here.
I think the belief is that it's some sort of audio feedback between rx/tx, but I don't think anyone knows for sure.
The SW bands are still full of weird stuff!
Ian