Newbie's First Questions RCA TS 721 Restoration

[Chris K]

Originally Posted by Electronic M

This is a early post war split sound set so the sound IF is 21.25MHz NOT 4.5MHz that intercarrier sound sets use.

Also he may be able to get away with a tube AM modulated signal generator...Most tube TV/radio repair grade generators distort the the RF carrier enough to create FM/PM modulation that TV audio systems can detect. I've done this with 2-3 different generators so far.

I have an old Knight Model KG-650 RF generator with an output range from 100 kilocycles to 100 megacycles. We might be getting into territory here where my comprehension database is running full throttle and losing ground!