This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in CB4234. The circuit is for controlling RF signals in a modulation system.
This simple circuit was found in Popular Electronics. It can be built with any JFET. Galvanometers from...
This circuit, with printed circuit board included, is from a Radio Electronics magazine from July...
This circuit for FET was obtained from a 1977 Radio Handbook. The input impedance is 150 ohm. The...