This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
We found this circuit in an old documentation for hams. In it we have the way to use a varicap to...
This fuzz guitar circuitry was found in an American documentation from the 80's. Transistors can be...
Of course, the range of this transmitter found in a 1992 documentation is not exactly 4 km, as it...