Re: Audio Cyclopedia - A highly recommended book

Pat T

"I've never seen the actual winding plans for the Radford amps.
Old secret stuff. Bah, let them keep thie bloody secrets, I don't care,
what I will wind will be better anyway.


I am, not sure about the situation in the US
but in the EU out of some thirty or so commercial transformer
manufacturers, there seem to be only two that can work to such a high
standard.


Lundahl and Sowter?

I have just nearly completed reforming a VAC 7070 amp with a quad of
300B per channel.

The brand of OPT used is unknown, but they do seem to have a big
simularity
to something made by Hammond, which is the brand used by many
hobbyists in the US and elsewhere.

Hammond ain't the cream though.

It don't matter though, because the VAC OPT do have **enough** bandwidth
to allow
faultless and blameless wonderful sound and technical performance.

So we have a situation where the Hammond is the main choice because its
affordable and good enough.

Something wound like an old Williamson would be 3 times the price, and a
waste of money imho.

If I was a commercial winder, I'd charge twice what Hammond does,
because I know I'd offer a slightly better performance at HF due
to much better interleaving, and better ranges of impedance matches
*without* wasting turns on the secondary.
See my website for details.

Feel free to wind anything you fancy at my website such as OPT No1.

Clever dicks will do a lot better than I have.

Patrick Turner."<<

Visit any transformer plant winding stuff under 25 lbs. or so piece
weight, you'll see a largely dickless workforce. Transformer winding is
women's work, quite literally, on a commercial basis.

--
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Relevant Pages

  • Re: Audio Cyclopedia - A highly recommended book
    ... Hammond ain't the cream though. ... Feel free to wind anything you fancy at my website such as OPT No1. ... Visit any transformer plant winding stuff under 25 lbs. or so piece ... Not many women worked in the design offices afaik. ...
    (rec.audio.tubes)
  • Re: Audio Cyclopedia - A highly recommended book
    ... Bah, let them keep thie bloody secrets, I don't care, ... what I will wind will be better anyway. ... All good coilwinders are very careful about giving away too ... Hammond ain't the cream though. ...
    (rec.audio.tubes)
  • A slam after my own heart
    ... "Hand built without compromise to perform without equal". ... official motto of one transformer vendor, Magnequest, of Philadelphia, ... transformer design, mostly the province of degreed engineers. ... not a transformer wind shop in the usual sense of the word: ...
    (rec.audio.tubes)
  • Re: A slam after my own heart
    ... official motto of one transformer vendor, Magnequest, of Philadelphia, ... transformer design, mostly the province of degreed engineers. ... "ALL ENGINEERING IS COMPROMISE. ... not a transformer wind shop in the usual sense of the word: ...
    (rec.audio.tubes)
  • Web Site Says Information Not Found in RDH 4. (Ahem).
    ... Just about everywhere there's AC you'll find a power transformer ... volt filament transformer as a source of operating voltage. ... wind 500 turns of No. 28 enameled wire in even layers ... loop for tap 2, then wind 500 more turns for tap 3. ...
    (rec.audio.tubes)