This circuit filters low frequency noise from the turntable motor. We found it in a 1989 documentation. The font doesn't have to be symmetrical, but it should have excellent filtering.
This adjustable direct current source circuit uses a triac operating as a variac. The circuit is...
With the precision given by the crystal this circuit provides signals of several frequencies for the...
This amplifier allows you to recover recorded tapes from a tape player that has the mechanism in...