Re: Toroids as O/P trannies
Hi Gents, most mains transformers run at about 1.5Tesla flux density. A quality O/P trans will run at half that and usually use Unisil grain oriented lams which go into saturation quite gently. This all helps to reduce distortion. Mains toroidals usually have quite a thick "lam" and will be lossier for the HR spectrum. They still work quite well and give close coupling. Thet are only really suitable for push-pull as it is not easy (but has been done ) to gap a toroid for single ended use.
The Oz designs use Unisil and thin strip. They also have screening fiol over the various windings to reduce capacitive coupling which would affect the feedback circuits.
Ed
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