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.
This excellent 30 W tube amplifier appeared in the April 1963 Radio Electronics magazine that...
This simple circuit serves to demonstrate the working principle of a Set-Reset flip-flop (S-R or...
The possibility of using the 4013 in the monostable configuration added to the input sensitivity of the...