12-14-2014, 12:23 AM
Because at low volume it hums 
The latest subject is a DeWald C-800 . With the volume turned all the way down, I have a steady hum. It doesn't get any louder when the volume is turned up. It just hangs back in the background when tuned into a station.
All caps replaced (except micas). Resistors checked and replaced as necessary. All tubes tested ok. Alignment done. On both AM and FM stations come in loud and clear.
Any ideas? This has really got me . I may take a ride over to freezing lake Michigan and jump in-like someone else we know
Thanks,
The latest subject is a DeWald C-800 . With the volume turned all the way down, I have a steady hum. It doesn't get any louder when the volume is turned up. It just hangs back in the background when tuned into a station.
All caps replaced (except micas). Resistors checked and replaced as necessary. All tubes tested ok. Alignment done. On both AM and FM stations come in loud and clear.
Any ideas? This has really got me . I may take a ride over to freezing lake Michigan and jump in-like someone else we know
Thanks,
Eric
Lake in the Hills, IL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
