12W Phonographic Amplifier and Compressor (T499E)

This 8-tube amplifier with 12 W output was found in an American publication from 1947. The output is in counterphase with pentode tubes.

| Clique na imagem para ampliar |

Error Amplifier and Trigger Generator (CB19981E)
This circuit was found in old documentation. The components can be replaced by modern ones. The...
Active Tone Control (CB18728E)
This transistor circuit consists of a well-known bass and treble control configuration. The...
Fast Photo Darlington (CB14647E)
With the circuit shown, you can have a fast response with a Darlington configuration. The circuit is...