Tube Amp Archive

I switched the ot leads and she howled so I switched them back. I also lifted the 2 caps in question and read .005vdc across them. I resoldered them. I also switched the polarity on the cap before the presence pot as I did have it orientated backwards. All the voltage read good but I still have +10...

thats the layout I used and I am using sozo caps for this build. I will check the coupling caps. Orientation of these is a bit confusing if it matters. I put the banded end of the caps to the grounded side throughout the preamp section. The tranny are designed for this build and are the same specs ...

guitarsnguns04 wrote:I recently built a express with 4 output tubes. After playing the amp for about 15 hours I notice the 2 power tubes on one side redpated.

It sounds like a bad coupling capacitor

gio