This signal injector and tracer (follower) was found in an old American documentation. The transistors can be general use and power is made with one or two common cells.
We found this circuit in an English magazine from 1976. The magazine no longer exists, but just...
We found this circuit in a Radio Electronics issue from August 1974. The frequencies generated depend...
This circuit was found in an old American manual. It is intended for testing SCRs and thermistors using...