Philco 42-345 Restoration/Repair
Posts: 5,652
Threads: 56
Joined: Sep 2008
City: Sandwick, BC, CA
Just a thought, this radio is behaving like the local oscillator isn't starting on it's own, though once started it stays working. I wonder if there is a resistor in the oscillator tank circuit that is misbehaving, or defective mica cap? I had a Northern Electric set where the oscillator would work normally sometimes, and at other times it would not work at the upper end of the dial, it turned out to be a flakey 27K resistor on the 12SA7 mixer-oscillator tube. The local oscillator in this set is a little different in that it uses an XXL tube rather then a pentagrid convertor, but there are similarities. You could try using the eraser end of a pencil to press on various components around the XXL tubes, particularly resistors. It could also be a cold solder joint.
Regards
Arran
Messages In This Thread
RE: Philco 42-345 Restoration/Repair - by Arran - 07-09-2025, 11:49 PM
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