We find this circuit in an American 80's documentation. No further information about the transformer is given. The circuit serves as a reference for any repair work.
New Low-Power PIC24 “GA7” Microcontroller Family Now Available CHANDLER, Ariz., Dec. 12, 2016 — The...
The purpose of this receiver is to monitor the signal from a nearby transmitter. It was published in an...
The LM567 is a PLL tone decoder that can also be used as a double oscillator as shown in the...