This is the circuit of a European commercial amplifier. It was published in Radio Electronics magazine in September 1958 and has a power of 5 watts with good sound quality.
This circuit appears several times in this section and on this site, obtained from different...
This circuit was found in a General Electric documentation from 1970. Equivalent transistors can be...
The circuit shown consists of a NO and NC sensor system for alarms. The output must be connected to a...