Quote:
Originally Posted by jr_tech
Since the IF board is shielded, I can't see if the active devices are transistors or ics.
But first things first, regardless of the type of device used for IF amplification, IMHO, the hum problem needs to be resolved before further problems can be addressed.
jr
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Well if the filter capacitor wasn't the cause of the hum (it still hummed even after the filter capacitor was replaced) what else could cause the radio to have a 60 Hz hum?