This circuit is from the 1968 ARLL documentation. The MOSFET admits equivalent and the coil determines the operating frequency range being the plug type.
This circuit makes use of an old operational and matched transistors. The circuit can be...
This sound relay, Vox or acoustic switch has a bistable action triggering a relay when the...
The circuit selected is from the 1960 Mullard transistor reference manual. The circuit is powered by...