First post. This is more of a radio-specific question than a clock question, but maybe someone has some ideas.
I have a GE C4331B clock radio that I picked up from eBay. The speaker gives a low-pitched hum whenever the radio is on, regardless of volume. In other words, it still hums when the volume is turned all the way down, and does not change with the radio volume. It comes on when the radio is switched on, and stops when the radio is shut off.
After doing some initial research on what causes speaker hum, I've determined that this is 60 Hz hum, which this site https://www.psaudio.com/ps-how/how-to-find-and-fix-hum/ says is "typically a result of poor shielding, cable problems, or close proximity to strong magnetic fields."
I've opened up the radio and I am guessing it is coming from the transformer right underneath the speaker.
I thought maybe there is a ground wire disconnected somewhere, so I bought a second one of the same radio on eBay to compare, and to my surprise, that one has the exact same hum!
Does anyone know if there is a way to eliminate this hum? I'd like to use this clock radio in my home office -- the clock itself is in great shape, and the radio tunes easily and plays clearly (other than the hum).
I have a GE C4331B clock radio that I picked up from eBay. The speaker gives a low-pitched hum whenever the radio is on, regardless of volume. In other words, it still hums when the volume is turned all the way down, and does not change with the radio volume. It comes on when the radio is switched on, and stops when the radio is shut off.
After doing some initial research on what causes speaker hum, I've determined that this is 60 Hz hum, which this site https://www.psaudio.com/ps-how/how-to-find-and-fix-hum/ says is "typically a result of poor shielding, cable problems, or close proximity to strong magnetic fields."
I've opened up the radio and I am guessing it is coming from the transformer right underneath the speaker.
I thought maybe there is a ground wire disconnected somewhere, so I bought a second one of the same radio on eBay to compare, and to my surprise, that one has the exact same hum!
Does anyone know if there is a way to eliminate this hum? I'd like to use this clock radio in my home office -- the clock itself is in great shape, and the radio tunes easily and plays clearly (other than the hum).
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