Audio amplifier 741 (CB20478E)

This low power audio amplifier was found at 1992s Popular Electronics. Transistors are general purpose common types.

Active tone control (CB9373E)
This circuit is from a Radio Electronics from the 90's. The integrated circuit is from the time...
Up to 200 MHz Oscillator (CB4344E)
This crystal-controlled oscillator can generate signals as high as 200 MHz. The L1 coil is made up...
Tuned Colpitts Oscillator (CB25315E)
We found this conventional version of a single-transistor oscillator in the January 1996 issue of...