Ron's Audio
                                             Sound for the regular guy


  Three Band 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.


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


    The board is single sided cut out on a CNC.


    Inside view of the chassis. To the right is a Glassware Audio PS-10 power supply which supplies the HV and regulated DC to the filaments.