This circuit with RIAA equalization is from 1985 US documentation. The circuit has a flat response of 150 Hz to 40 kHz. The power supply must be symmetrical.
This circuit was found in a 1965 General Electric manual. It is intended for cars that have...
This circuit was found in a Popular Electronics from the 90s. Transistors are general purpose...
We found this circuit in a Hands-on Electronics from 1985. The circuit is based on common...