This circuit is from a factory manual from the 80s. The circuit can be implemented with more modern operationals. Capacitor C1 is a low leakage type. The power supply must be symmetrical.
This circuit was found in the February 1993 issue of Radio Electronics magazine. Some components depend...
This sweep generator or current-controlled oscillator was found in Popular Electronics from...
This audio amplifier was found in the July 1984 issue of Radio Electronics magazine. The supply...