26 January 2009

PTO, taking apart

Sorry I kept you waiting for further pictures of the PTO. This is it, removed from the FM 88-108 car receiver.

A small piston drives three cores in and out inductors. There are two adjustments. One marked "IF", the green can. The second looks like a trimcap, marked "OSC".

I am slowly digging my way to the circuit behind PT inductors. Then I should be able to draw a circuit diagram.