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 80's Radio Electronics. The circuit decodes “scrambled” or...
This circuit uses a JFET at the input to increase the impedance. The circuit has a gain voltage...
Found in a 70s RCA manual, this circuit uses transistors from the era. Equivalent types can be...