08-27-2023, 02:04 PM
https://philcoradio.com/library/download...20Book.pdf
Hi Gents
Philco used on some of their radio/phono a 4 terminal volume control (14). Two controls using a common carbon track. Turn it all the way one way it controls the radio volume the other way the phono. On the schematic it look's like a 1/2 meg pot and a separate 1/2 resistor. But it isn't. It has connections at the top, wiper, tap, and bottom. Just a quick perusal you may not catch it. I didn't the circuit didn't make any sense. Mark Opatt may have a replacement that he put together for you if it is needed.
Happy Troubleshooting!
Hi Gents
Philco used on some of their radio/phono a 4 terminal volume control (14). Two controls using a common carbon track. Turn it all the way one way it controls the radio volume the other way the phono. On the schematic it look's like a 1/2 meg pot and a separate 1/2 resistor. But it isn't. It has connections at the top, wiper, tap, and bottom. Just a quick perusal you may not catch it. I didn't the circuit didn't make any sense. Mark Opatt may have a replacement that he put together for you if it is needed.
Happy Troubleshooting!
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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