This is the commercial circuit for the TRF-44 amplifier sold in Japan in the 1960s. The circuit provides a few hundred milliwatts and is intended to be used as small, battery-powered turntables.
This circuit delivers at its output a voltage that proportional to the amplitude of the input...
This circuit generates signals with opposite phases determined by C1 and adjusted by R2. The...
In the diagram from the November 1999 Electronics Now magazine we have the way to improve both the...