This circuit was found in an old American documentation. Its purpose is a proportional scanning signal for the oscilloscope of the time, which used cathode ray tubes.
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...