This traditional signal injector configuration was obtained in a 1977 amateur radio manual. The frequency is given by the capacitors and the supply can be made with 1.5 or 3 V.
This circuit was found in a. transistor Manual from 1958. This is an amplifier stage with a...
Another of the many similar configurations we have in this section. This one is from a Radio...
We found this circuit in a Radio Electronics from October 1965. The pickup coil can be of the...