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 May 1970 issue of Radio Electronics magazine. The circuit uses...
This capacitive switch or approximation relay was found in a 1980s US publication. Power should...
This circuit is from a 1974 publication, but it can still be easily assembled today with BC548...