Tunable Marker (CB22033E)

This variable high frequency oscillator circuit was found in an old English documentation. The JFET can be of any general-purpose type.

Binary Divider (CB6609E)
This circuit was obtained from a 1967 General Electric documentation. The circuit makes use of...
TTL Astable 7401 (CB19417E)
This configuration uses the 4 gates of a 7401 integrated circuit. The capacitors determine the...
60 Hz Rejector Filter (CB13588E)
This filter can be used to eliminate hum in sound equipment. Operational amplifiers can be 741 and...