Quote:
Originally Posted by Skywave
Is the PSU that powers your transmitter an SMPS? If so, those spikes could be coming from that. Those spikes are what I would expect to see from a relatively low-freq. square-wave after it had been passed through an HPF.
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Hey Al, the same thought about the stripped-out square wave did occur to me. But there is no such signal source in the electronics here. I built a super-regulated linear power supply.
The square wave is likely from the living room lights (subject of another thread on mains-borne interference) and the antenna itself must be the high pass filter...so the antenna is directly picking up the signal from the lights , perhaps ...