This is a battery powered 3W power amplifier using germanium transistors. The circuit is from an English documentation from 1967. The transistors are from the time.
This circuit was obtained from a 1990s documentation. The transistor admits equivalent and other...
This shield was found in the June 1995 Electronics Now magazine. The circuit uses a low-power...
This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is...