This 8 W amplifier with germanium transistors was found in a Japanese documentation from 1967. The circuit is of the commercial type and is powered by two 12 V batteries or by a symmetrical source.
We found this circuit in a 1992 Popular Electronics. The circuit has an optical sensor with LED...
This circuit for 40 V systems was found in a Linear Technology application manual. The circuit...
This sensitive passage alarm was found in the August 1971 Radio Electronics magazine. The light...