Smallest most compact RF modulator?

[Findm-Keepm]

Originally Posted by Electronic M

Neat to get a look inside that.

That adjustment is NOT a pot, it is a ferrite tuned inductor or transformer. It likely tunes the frequency of the modulator, or some filtering for the system. I agree, you don't want to mess with it casually.

The saw resonator sets the Output frequency - the adjustable coil sets the Audio modulation center frequency, for the 4.5MHz offset.

I've got several hundred brand new SAW resonators for a later Toshiba chip - useless these days, as the chip is about 3 bucks, and a whole modulator is a buck less.