• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tube Amp Repair assistance

I have (3) monoblock tube amplifiers that were custom made for me yrs ago. The builder is now retired and not able to work on them anymore.

I am looking for someone (preferred within a 3hr drive of Detroit, who would you be interested in looking at these amplifiers to see if there is anything we can do to minimize some of this distortion I get at high volumes without taking away from the magic they deliver?

The wiring is point to point wiring - no PCB involved. Output is 1625 tubes in Push Pull configuration. Input is 13EM7/15EA7 tubes. Transformer is HH-SCOTT TRA-15-2 on the stereo pair and the Center-3rd is an Aerosound TO330.

I am not a Tube-Electrical Engineer, but I remember there were some added transistors added for distortion to help them better balance or something. Looking at the wiring connections I would guess it will make more sense.

Anyone interested or know of someone I should contact?
 
There can be an absolute chasm between a repair tech and someone who can actually do the work that you are looking to have done. You're interested in a redesign of a circuit, which is not something the average electronics repair tech will be well equipped to do!