Philco model 77 am radio. - Printable Version
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RE: Philco model 77 am radio. - Dave c - 10-08-2025
Well I connected it up and powered the un8t on. Volume on full and no hum at all. You can hear the audio is working as you can hear a slight cracked noise as you turn up the volume. Once I connect the antenna, I just pick up an AC HUM. Mostly in the 65 range on the tuning dial. With the radio in this state, I tried another AM radio and it then picks up the AC hum as well. It seems it's being emitted from the philco radio itself.
I am lost for idea's at this point. Any thoughts would be greatly appreciated. The power supply hum is gone with the new condensor box caps.
Thanks in advance for all your help that has been given.