London Power 3 channels amplifier project

[Vostre Roy]

Greetings again!

I've been quiet as of lately, had to complete some home projects before I could pour some money in this one. As of right now, I've got a brand new steel chassis and a knockout punch kit coming my way so as soon as I get back home later next week, I'll be able to jump back on this project.

Now, quick question to Mr O'Connor: reading the PA-66 document, I just realized that to be able to have a switch to alternate between fixed and cathode bias, I'd need a DPDT switch for every single power tube, I'm I understanding the document correctly? If that's the case, I might just disregard that option and go with the Fixed-Bias option, unless you have a better recommendation.

Cheers and (late) happy new year to all!