07-22-2008, 10:06 PM
Ed, the Philco models 71 and 89 along with several other models used a type 36 tube as the oscillator. It was a marginal circuit design that was very problematic. Ron has redesigned the circuit to use a type 6A7 tube as the oscillator, hence "super".
Oops, too late! Steve
Oops, too late! Steve
M R Radios C M Tubes