Based on a PLL 567, this circuit serves as a receiver for the CB9574E circuit. S tuning is done in R1 and it is used for frequency modulated signals.
This circuit encodes the two channel signals from an amplifier for a multiplex-stereo...
This radio for the medium wave band was found in an old American documentation. The transistors are made...
This lock-up alarm circuit was found in a 1990s Radio Electronics magazine. The sensors are...