Can someone explain what's going on here? So far I'm not alarmed. I have a negative ionizer beside my listening position 13ft. away from my Acoustat Servo OTLs. Every once in a while I'll hear a 'snap' out of the ionizer, obviously a discharge of build-up grounding to the fan it's sitting on. However it appears to cause a couple of clicks in one of the amps. They are on separate circuits. It sounds like the relay in the amp is clicking. weird.
It is clearly, an interference like those caused by cell phones near an audio amp. It's only a RF radiations and detection.
Look up ‘spark gap transmitter’ - which was the only type before tubes with grids arrived on the scene.