Found in 1967 General Electric documentation this circuit uses a PUT and a diac to generate 1 kHz signals. The circuit has a start switch.
This traditional crystal radio circuit, but which has a modern version with diode, was found in an...
We found this circuit in documentation from the 1980s. The transistors can be the BC558 and the...
The input resistance of this circuit is 60k and the pass band from 20 to 20kHz. The circuit is...