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 circuit was obtained from an 80's documentation from General Electric. The circuit uses an...
This circuit, from a 1987 documentation, is for the CB3817E transmitter. Connected to the handset...
We found this circuit in the National Semiconductor FETDatabook of 1977. The signal has an...