500 mW amplifier using the 741 (CB6991E)

This circuit was found in 80's Popular Electronics. Transistors are commonly used. The potentiometer R5 adjusts the gain.

| Clique na imagem para ampliar |

Long Term Delay (CB5153E)
We find this circuit in a 1980s documentation. The circuit uses uncommon components today which can...
Four Octaves Electronic Organ (CB1437E)
We found this circuit in a 1977 Radio Shack documentation. The circuit should be powered, for...
Digital Gain Control for Operational (CB15010E)
With the circuit shown in the figure it is possible to digitally control the gain of an...