This is the commercial circuit for the TRF-44 amplifier sold in Japan in the 1960s. The circuit provides a few hundred milliwatts and is intended to be used as small, battery-powered turntables.
This good timer using only transistors was obtained in a 2003 documentation. The circuit has 6...
This circuit from the 80's can be easily implemented but needs some changes to avoid problems with...
Maxim MAX20416 Step Down Converters Available through Mouser Electronics these 2.2 MHz converters feature...