[morzh]

You're doing great.
I wish I could be more involved, but my mind is right now preoccupied with the reason I am here in the first place.

Magnetic tuning is way cool, and watch it work (especially demonstrating it to others) is even cooler.
I think what we today call PLL was patented by Philco, a year before and used in a few radios next year, that is 1937.
In other countries later they used motorized auto-tuning (some even in the Soviet-build sets).