This good power amplifier, a few tens of watts, is part of an article in the December 1972 Radio Electronics magazine. The power supply must be symmetrical with at least 3 A.
This oscillator was found in the November 1986 issue of Radio Electronics magazine. The frequency...
This sophisticated circuit with a low, medium, and high treble filter is from 1990 documentation. The...
This circuit was obtained from a 1998s Popular Electronics. The magazine no longer exists, but the...