A few years after building the 1955-1 version of the Mullard 3-3 tube audio amplifier, I’ve finally decided to make another model with the original tone controls. As previously mentioned in other parts of these writings, these controls consist of a treble cut and a bass boost.
This is how the exterior appearance of the built amplifier looks.
The same layout of the tone controls on the front has been maintained as in the original model.
Below is the circuit schematic.
Download 1955-3A schematic in PDF
And the wiring as seen from the bottom.
