Quote:
Originally Posted by Sandy G
I have a postwar AM/MW radio, wooden cabinet, that has a PTO. Too lazy to get a ladder & see who made it, but I DO remember it was a rather obscure make I'd never heard of. The PTO didn't seem to offer any real benefits over a std tuning condenser.
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IIRC, they were using up parts left over from the prewar models. The slug tuned coils eliminated the tuning gang and a separate oscillator and RF coils.
The larger firms like RCA and Philco, didn't use them, but the smaller players did. Admiral, Detrola and Belmont used them, until the supply ran out.
Then they went back to the tuning condenser and the separate coils.