We found this circuit in a Radio Electronics from October 1963. The circuit uses an output transformer with a center tap. The trimpot is adjusted for higher gain and lower quiescent current.
The scratching noise is quite unpleasant for those who pass the sound of vinyl records to other...
This circuit for common analog telephones was found in March 1982 Radio Electronics magazine. It...
In the figure we have an RF amplifier for tunnel diode. The frequency range will depend on the...