Just adding to the above - I have no intentions of building 100 kilowatt guitar amps or the like. I simply want to use the research information attained in the Manual and scale it down for stuff under 10 kilowatts ( say push pull 833 triodes, or the other newer ceramic type vacuum tubes; etc.)
Designing really LARGE Power Transformers ends up as a specialist feild once you start getting over a kilowatt or so. Even more so with Audio Transformers.
So far this manual is the only Audio Transformer design material I can find on the really big stuff from covering 20hz-20khz in frequency, output impedances & voltages for standard transmitter tube operation such as those used in AM Modulators and specialist Audio equipment in industry.
With some fiddling of the figures and design parameters I cannot see why really big Hi-Fi stuff could not be designed from this manual, as it gives step by step design proceedures for practical construction of really humungous Audio Transformers.
For the serious builder - it would be far cheaper to build yourself than get a commercial winder to do the job.
I pretty well have most documents/books/articals readily attainable from the internet that are FREE on Audio Transformers ( but many links have since been lost as the websites close down ); but there are a few items that would be worthy of adding to my own collection if I can source them; such as >
'Electronic And Radio Engineering' ( By Frederick Emmons Terman ) as published in 1955, with 1078 pages; etc.
If anyone has other information on - Audio Transformer Design and/ or Construction - please email me - Thanks!