First comes modulator, very strange and complex one. It has some kind of ALC with diode at the output so it measures power across the band and set voltage on driver transistor. Output is about 135mW. Lock range is about 10MHz without expanding / squezeing coil.
Then, old PLL and my replacement one (with MC145151). Old one could lock only odd frequencies, and I could only guess dip switch combination
Old:
Replacement:
Stereo coder, with 4066 switch, properly filtered...
And power amp, MRF237 and some Philips transistor
Triple filtered, still works perfectly.
