This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled variable resistor and can be used with audio signals. Transistors admit current equivalents.
This amplifier for public address was found in English documentation from 1967. The transistors are from...
January 2017 - Pulse Electronics ER11 transformers with high insulation can be obtained from...
With only 1% distortion, this Motorola amplifier found in a 1968 documentation makes use of period...