We found this circuit in a 1973 documentation. The null adjustment trimpot is 10k. The circuit can be powered by symmetrical sources from 9 V. The diodes on the bridge can be 1N4148.
The circuit shown can be connected in parallel with the speaker of a sound system. Its purpose is to...
This article is from a publication by A. Fanzeres from the 70s. We kept the original text. Using a...
This is a traditional configuration of a transistor amplifier with complementary transistors that can be...