Audio amplifier 741 (CB20478E)

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

3 to 30 V x 100 mA Power Supply with the 741 (CB12289E)
This configuration of variable voltage regulator from 3 to 30 V with 100 mA maximum current was...
Alternating Current Electrolytic (CB4613E)
We can use high value electrolytic capacitors in alternating current circuits with the...
Phase shifter (CB9451E)
Found in a 90's EDN, this circuit changes the phase of a signal from 50 to 60 Hz in 120 degrees. The...