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Old 20th May 2017, 10:11 am   #5
Skywave
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Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
Question Re: MW Loop antenna bizarre 'scope waveform??!! Ideas please...

Those spikes don't look like they are being produced from a linear analogue source. 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.

Al.
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