This circuit was found in an 80's Electronic Engineering. The power supply must be symmetrical. The no value components are calculated for the desired frequency.
This 12V small battery charger has been found in US documentation. The circuit charges with a 75...
This crystal-controlled oscillator was found in the January 1994 issue of Electronics Now. Other...
This power supply was found in a RCA publication from the 1970s. The circuit uses transistors from that...