Audio amplifier 741 (CB20478E)

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

Stereo FM Transmitter (CB16538E)
This small FM transmitter for short distances has a stereo multiplexer and can be used over an...
Headset Amplifier H530 (CB18399E)
This commercial circuit of 3 transistors was found in Japanese documentation from the 1960s. The...
Wien Bridge Oscillator MC3403 (CB15293E)
We found this circuit on Motorola's 1993 Linear Interface ICs. Equivalent operational amplifiers can be...