This small 1W turntable amplifier was found in the 1975 RCA tube manual. It is a commercial circuit at the time.
This conventional version with a transistor, already explored many times on our website, was found...
This circuit came out in an English magazine from 1977, but it can be easily assembled today, as...
This simple radio for listening to a headphone with two CK722 transistors was found in Radio...