We found this circuit in a Radio Electronics from April 1965. The components are from the time and the power supply is for 12 V cars. The transistor must be equipped with a good heat radiator.
The operational amplifier used on this 1968 circuit is not common today. However, the setting can be...
This configuration reaches a few tens of megahertz depending on the crystal and the FET....
This optically coupled circuit was found in the February 1968 Radio Electronics magazine. The...