This circuit uses a dual-gate MOSFET, a rare component today. We found it in American documentation from the 1980s. The rest of the components are common.
Similar to other circuits found in this section, this circuit is from a 1996 Electronics World;...
This circuit is an improvement of the previous one, with the use of two transistors produces a...
This small receiver for the medium wave range was found in a Japanese documentation from 1961. The...