Quote:
Originally Posted by old_tv_nut
Random thoughts:
Seems very peculiar that a battery could do that. Could it be some kind of regeneration? Does it only do it with your hand? How about if you place some metal (aluminum foil) near the radio? Does the set have an external ground and/or antenna?
For the HVAC effects, how about snooping around with a transistor portable to see if you can locate the source?
Edit: the source of the buzz could be completely separate from the HVAC, which may be adding its own effects somehow.
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The radio does have a ground wire lead but it's not hooked up because I don't have a good spot to hook it up to.
As for the buzz on the batteries on the Coronado Radio I figured out it was my laptop power supply brick apparently was making noise which is weird because it didn't used to be that noisy... a failing laptop power supply?!
My desktop computer's power supply does the same thing but 10x worse.
As for the HVAC noise on the RCA radio, I know it's something with the HVAC because it only does it when the HVAC system kicks on and off (the popping noise and the audio raising and lowering volume) the buzzing I think was the same issue as the Coronado radio.