This is the factory setting (National Semiconductor) of the TDA2006 as an audio amplifier. The circuit works with 24 V and the diodes can be 1N4148.
Found in an English publication from 1967, this circuit generates 5 kHz signals with harmonics that...
This preamplifier circuit for turntable cartridges was found in the March 1994 issue of...
This circuit is from documentation from the 80s, so it makes use of an operational amplifier that...