42 kHz oscillator (CB21805E)

This circuit was used as an eraser for old tape recorders. The circuit is from a 1960 Mullard transistor manual.

Tone control (CB12770E)
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....
Phase shift oscillator (CB20438E)
This circuit has a common configuration widely used in projects on this site. The transistor is...
555 Linear Ramp Generator (CB6357E)
This circuit appears elsewhere in this section and on this site. The circuit generates a linear...