This small tube amplifier appeared in Radio Electronics magazine in February 1958. The circuit is powered by the mains with a power transformer and output with different impedances.
Found in American documentation from the 90s, this circuit is ideal for wearables and can be...
This low distortion circuit was shown in the July 1983 issue of Radio Electronics magazine. The...
Using an operational and a transistor according to the maximum desired current, this circuit...