Found in a 70s RCA manual, this circuit uses a transistor of the time for an UHF L band oscillator. Details of the resonant circuit, which is critical, were not given.
This circuit locks when the sensors are opened. The relay can be 6 or 12 V depending on the power...
The indicator instrument of this transistor tester, from an Argentine publication of the 1970s,...
Found in American documentation from the 90s, this circuit uses TTL technology and is therefore...