This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
This simple balance indicator for sound equipment was found in a 1982 documentation. The M1...
Originally created to feed the filaments of a 12AX7 as an audio preamplifier to eliminate the...
This circuit was found in an American 1960s documentation. The circuit uses transistors of the...