2-JFETs Oscillator (CB22396E)

This LC oscillator was found in English documentation from the 1990s. JFETs may be general-purpose equivalents.

High gain amplifier (CB23897E)
This is an amplifier with one of the first integrated circuits available, the CA3020 which was...
Differential microammeter (CB7362E)
This circuit was obtained in a 1964 Electronic Design. The transistors are from the era and the...
Tunnel Diode Listening Transmitter II (CB19426E)
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...