This inverter with the 555 IC provides a high voltage output, but very low current. We found it in an 80's documentation. The transformer is according to the desired voltage.
This circuit was found in the August 1993 Electronics Now magazine. It is for telephones used on...
Found in a 1966 documentation, this mid-wave receiver makes use of period germanium transistors. The phone...
In this circuit, a jack with a diode activates a relay in a security system. The circuit is from a...