This preamplifier circuit for turntable cartridges was found in the March 1994 issue of Electronics Now magazine. The circuit is suitable for magnetic cartridges.
This circuit was found in the Spanish magazine that no more existis Mundo Electrónico, in a...
A high level on the input of this circuit causes the trim voltage adjusted output voltage to drop to 1.2...
This circuit is from old documentation, but the regulator may be 78xx series equivalent and the...