Operating in class AB1, this high-fidelity amplifier was found in the 1961 RCA tube manual. The circuit has high input impedance and good gain.
This circuit turns on and off when a short pulse is applied by SW to the input of the first...
We found this circuit in a publication of 1991. The audio amplifier is an operational that admits...
The oscillator of the figure has its frequency determined by the crystal. The indicated value is...