This very complex circuit in terms of the number of transistors was found in Radio Electronics from March 1966. The circuit is for low impedance headphones. The transistors are from the time.
This circuit can be used as an input shield by removing the signal directly from the second port,...
This sensitive circuit was found in an Electronics Hobbyists Handbook from the 1990s. The circuit can...
We found this circuit in an 80's documentation. The circuit has a gain of 30 dB and uses a varicap...