We found this circuit in a 1957 Raytheon transistor publication. The circuit can be assembled with more modern transistors with minor changes. The handset must be high impedance magnetic.
This low distortion circuit was found in a 1964 Electronic Design. The transistor admits...
Found in a Hands On Electronics of the 80s, this circuit makes use of an integrated circuit of the time...
The circuit we present is suggested by Linear Technologies (www.linear.com) and makes use of an...