This circuit detects changes in magnetic flux in a coil as an external magnetic field moves. The circuit is from Electronics Now magazine, October 1996.
This transmitter circuit for the 11-meter range was found in a 1990s spy book. The circuit...
This 6-transistor commercial radio was manufactured in Japan in the 1960s, intended to receive...
This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with...