This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in CB4234. The circuit is for controlling RF signals in a modulation system.
The frequency of this transmitter depends on the coil. For 100 turns the operation is in medium...
Found in Popular Electronics from March 1967, this circuit uses contemporary germanium...
This capacitor for small capacitances is based on the tuning of a receiver circuit. The variable is...