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Old 6th February 2009, 10:45 AM   #1
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Default audio transformer spec quad esl

Hello im currently renovating three quad esl 57 one of the audio transformer is broken " self inflicted" havenīt found any spec on the transformer. would like to get replasment for it.
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Old 6th February 2009, 09:24 PM   #2
expert in tautology
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Join Date: Apr 2002
Location: New York State USA
Four choices:

- replace with "old stock"/used original unit. (ebay, etc...)
- replace all three with new xfmrs of suitable spec
- buy three "new" xfmrs from the German (iirc) company that is now making them. (or other supplier like that)
- reverse engineer the bad xfmr, and wind ur own (or have it wound for you)

Determining the turns ratio and freq resp, etc (the xfmr specs) isn't that difficult to do using one of the "good ones."

_-_-bear -- Btw, I don't actually know anything, FYI -- every once in a while I say something that makes sense... ]
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Old 10th February 2009, 04:17 PM   #3
diyAudio Member
Join Date: Jan 2005
Location: Berlin
Hi nobody,
you can ask them, they have made all transformers for QUAD:
Sowter Transformer Ipswich England
they are very friendly.
Good luck!
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Old 11th February 2009, 10:20 AM   #4
405man is offline 405man  Scotland
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Join Date: Dec 2003
Location: South Lanarkshire near Glasgow Scotland
I have a spare one I would be prepared to exchange for your faulty one, send me an email if you are interested

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