This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is not an easy component to obtain and the power can be supplied with a single button cell.
The integrated circuit used is uncommon today. We found this configuration in Motorola's 1990...
Combined with the two previous circuits, we can create a simple multimeter with this circuit. The...
This FM transmitter was described in the Radio Electronics magazine of June 1963. It operates in...