China long range locator
When I read that the transmitting frequency was 5.5-6KC and modulation of 300-400hz (or whatever)first thing I thought of was Estebans modulated LED albeit at 6KC instead of the FM broadcast band. At that frequency you could easily use a PLL to monitor the phase change of the LED's beam as it scanned the ground. Kinda strange using that frequency and modulation for anything else other than as you say a pure hoax.
Esteban you out there? What's your take on this?
R.S.
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