Found in a 1969 Burr-Brown publication, this circuit makes use of integrated components from that period. With modern equivalents, it can be adapted to be used as a shield.
This circuit was obtained from an English magazine from 1979, but can be easily assembled...
The purpose of this circuit is used in communications and to respond to signals that are in the 2...
This circuit was found in the November 1989 Radio Electronics magazine. Power supply depends on...