We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
The transformer for this project found in a 1986 documentation is an output type, found on old...
This circuit was found in a Popular Electronics from the 90s. It is based on components still...
We found this circuit in an American documentation from the 90's. The circuit makes use of general...