This 600-ohm output impedance circuit was found in a Radio Electronics from October 1963. The circuit uses PNP transistors of the time and is powered with a voltage of 12 V.
This is an amplifier with one of the first integrated circuits available, the CA3020 which was...
This circuit was obtained in a 1964 Electronic Design. The transistors are from the era and the...
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...