The purpose of this circuit, which we found in an August 1973 Radio Electronics issue, is to determine the characteristics of a tunnel diode.
This circuit is from an article in the December 1988 issue of Radio Electronics magazine that...
This circuit was found in an American documentation from the 80's. The sensor is a special...
The FET can be a BF245, and the other transistors can be the BC548 and BC558 in this simple AM...