This is the typical circuit of a local oscillator for a superheterodyne FM receiver. The circuit was found in a 1980s documentation and is typical of early and early receivers.
This circuit is indicated to power TTL circuits with current drains up to 500 mA. The transistor...
This circuit is from a 1997 publication, but it can be assembled with a BD136 for TR1. The...
This control circuit using a low voltage switch was found in the September 1987 Radio Electronics...