• 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.

VTA M125 triode switch bypass

Hey guys

I recently started working on my M125 tube mono blocks from Tubes4hifi after I started their rebuild about 4 years ago. These were previously working but being the first amps I had ever made the wiring and soldering was a bit crude and I decided to start over. These amps are now offered without the triode/ultra linear switch and I would really like to bypass that switch as I'm rebuilding these to clean up the wiring inside.

I have tried reaching out through the Tubes4hifi website but I'm not getting any response. If anyone would be willing to help guide me on what to do I would appreciate it!
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Hey Brandon, do you work in a metal fab shop? That's quite the hard core steel chassis. 🙂

jeff
We have a full fab shop at work, I designed the chassis in AutoCad and had it lasercut. I do lots of design work for my industrial automation company so building amplifier chassis was a fun side project.

@Alashikata I've read that before, unfortunately a lot of it is beyond my electrical skills. These amps ran fine for a long time so I plan on keeping them mostly the same.