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 simple circuit was obtained from Popular Electronics in December 1990. The magazine no longer...
Indicated by a 90s Popular Electronics, this circuit amplifies acoustic signals for analysis on an...
) This variable frequency oscillator was found in an old American documentation. Transistors allow more...