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.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...