This transformerless 16-ohm speaker circuit was found in a Radio Electronics from October 1963. The circuit is powered by 12 V and the gain is 50 dB.
This low-power transistorized amplifier was found in documentation from the 90s. The circuit uses...
This circuit is from Popular Electronics from March 1991. It can still be assembled with the...
The voltage of this symmetrical power supply depends on the regulating integrated circuits, which...