XjFred

Here’s 1Kohm + 1nF between PT sec, no other changes. Hum only audible when master vol is dimed. Doesn’t bother me anymore on rehearsals...

Could be related for lead dress with certain resistance settings on following tubes grid making the master vol pot wiring to pick up...

Problem solved. Adding the MV potentiometer required me to run a long cable between the slider of that MV potentiometer and the grid...

legit. i also do this for my mental health - in situations where i’ve just finished off a complex breadboard or pedal build, often i’ll...

I'll try that. It's a brand new Alpha pot, DPDT push-pull.

Is it a good, clean pot? Honestly a lot of the time, pots just need a good contact spray shot, even new ones.

It's amazing how much a tiny 220-ohm resistor can change everything..... :LOL: Now this thing is loud. Much louder than I could have...

My tool shows DC in yellow. You are between a cap and ground there so 0DC is expected. What you have is a severely unbalanced PI that...

And It shows exactly my 300V and 200V. Your tool is excellent and confirm exactly my mistake. 👍 And the 0V at grid of V2b is probably...

There you go ;) 220 bridge removed.

I've find this afternoon I forgot the 220R resistor (R18), hidden in the centre of the V2 socket. Can you try without 220R (cathode...

I just modelled your PI with my awesome tool ;) and I am getting V2a at 229V and V2b at 219V. It's not a perfect model, but I would be...

Haven’t messed with see-saw floating paraphases, but above is what the bible has to say of your PI. Balance is greater with fig.12.35...

Hello, everyone! I received the kit from Tube Town, Germany, along with the various parts I needed to make the modifications I wanted...

Bypassed fuse allows you to avoid putting a light to monitor switch on. At least once.