|
It is a Mallory InducTuner or InpuTuner with continuous tuning and no high/low TV band switch. There is a four position function switch to select phono, AM, FM and TV. The AM tuner section is an integral part of the main chassis, and shares one of the TV sound's IF amplifiers (at 455 kHz). From what I can tell looking at the schematic from SAMS, putting the selector switch in any position other than TV kills the B-plus to the sweep circuits and may also turn off the CRT filament (I need to print out the schematic and get a better look).
The good news is that the continuous tuner is not frozen and actually tunes without much effort. So I think that the delicate ceramic shaft must be OK. I don't want to mess with it much until I've had a chance to check it closely and carefully clean and re-lube as necessary.
|