This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of components of the era, but modern equivalents can be used.
This gun-like sound effects circuit is based on the PLL4066. The circuit was found in the December...
This high gain small signal amplifier circuit was found in an old publication on transistors....
This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals...