Three Band Vacuum Tube Tone Control

        Being my ears are not what they used to be, I built a three band vacuum tube tone control. This circuit was designed by Max over at Fun with Tubes.  (A 3 Band tone control that you could love) . It is a unity gain three band control using two 12AX7’s and one 12AU7. I removed the Glassware attenuator I had originally installed in the EL34 amp and installed it in the tone control.

# band Tone Control
Tone control Schematic

Schematic as Max has designed it. you can read a description here , scroll down the page to find it. he has recently revised the schematic.

3 band tone top inside
3 band tone top inside 2

The board is single sided cut out on a CNC.