Rob I am new here.

Also just picked up C51 and P51 pair.
Have ordered new electrolytics to fit.

Can't access the link you posted here, says I need permition. Have requested permission with my boilerpeopleltd email address. Can you take it out of your spam if it has got stuck there?

My main question is how to connect speaker cable for bridging? I suspect after puting mono switch across connect to two reds, right? OR is it red one channel black other channel?

Other question, is there a bias adjustment at the pots to fine tune?

Many thanks in advance.

I am fully conversant with designing and building valve amplifiers. know nothing about BJT designs.