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.
And the wiring as seen from the bottom.
Friday, October 27, 2023. In a short amount of time, I hope to conduct some measurements on this amplifier model with original tone controls to determine its frequency response and other parameters. Right now, I have to undergo surgery to remove my prostate due to the adenocarcinoma that showed up in the tests and biopsy.