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.
We found this circuit in a 1967 Electronic Design. The circuit used a MOSFET of the time, which is...
This circuit uses an audio output transformer found in old transistor radios. Power output is...
This sensor circuit for a small robot was found in a Popular Electronics from the 90s. The circuit...