More DIY Amp Design & Fettling.

[PerdioPal]

That is particularly daft, I love it! Hand winding (did you?) big toroidal transformers is much easier than little ones, thicker wire, more room and fewer turns, win, win, win. One valve amp I did used an off the shelf 55-0-55 toroid, that was doubled for the HT using silicon diodes and a few turns added for the LT, I recall 6 turns a volt not too arduous. The HT turned out at about 330V, spot on.