{Collins} 75A-4 "Motorboating"



A friend of mine has a 75A-4 that was overhauled by Howard Mills several years ago.


It has developed a problem: On CW and SSB there is only what I would call "motorboating"

on the signal. It's a low level, not enough to overcome the signal, but annoying just the same.


This is not heard on AM, so I would suspect the Product Detector, but all the parts were

changed during the overhaul.


Any thoughts or suggestions ?


73, Dick, W1KSZ


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