Quad ESL57 - Treble reduced radically? - Page 3 - diyAudio
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Old 9th May 2011, 08:35 PM   #21
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I would not use 12um for the treble panels. 3um would be more appropriate.

But, it is not an easy job to dismantle the panel and fit new film with good coating.

Regarding the EHT ... it is usually the diodes that are faulty. Only replace parts in the EHT if the voltages are low (without load, disconnected from the panels).
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Old 15th May 2011, 10:58 PM   #22
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I use 6uM film for Quad 57 treble panel diaphragms.


ER Audio has rebuild kits that will provide everything you need to rebuild a set of quads.

Quad 57 Repair Kit


Sheldon
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Old 15th May 2011, 11:31 PM   #23
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All I can say is a huge THANK YOU to all who responded - what a forum, and what a group!

Sheldon, I downloaded your (extraordinary) guide; this is a major achievement, and I congratulate you heartily. It is hard to see how this piece of work could be in
any way improved. I read it slowly and carefully, as it deserved, and it gave me some courage to go forward.

As I have only the most rudimentary electronic skills I proceeded extremely slowly in the analysis: try as I might I could find absolutely no signs of any arc-damage on the treble panel. So I took a small risk (remembering my lack of skills...)
I decided it might be the EHT panels: they were of different vintages anyways, so I figured I only had a little to lose.
One thing led to another, as it inevitably does, and I decided to re-wire the three panels at the same time.


Result - back in HEAVEN!


The panels took a little time to charge (about fifteen minutes), and again the sound is breathtaking. Actually, what sound? With the 57s it's just about the music!

I'm glad to see the Maggies (12QR) go: with no disrespect to them, the company, and certainly not the owners of the same, they're simply not the same experience.

BTW, just picked up a mint Proton D1200: stable and powerful.....and big green meters <grin> The speakers certainly seem very happy with their new diet.


Again, a huge thank you to all: it's a wonderful feeling to know there are kindred spirits - who give their help so freely!
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Old 16th May 2011, 06:40 AM   #24
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It feels really good to be able to help with these great speakers. There are different ways how to fix certain problems - and this is the good thing about forums - everyone gets a chance to tell their story.

I also used Sheldons guide to learn about the ESL:s before I tried to fix them. Very good work!

Happy listening!
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Old 16th May 2011, 10:13 PM   #25
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I've got several hours of video detailing my current rebuilding techniques for both the original Quad ESL's and the ESL 63's. I need to fire up Final Cut and edit it into something for public consumption.

Stay tuned.

Sheldon
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Old 17th May 2011, 09:38 PM   #26
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Will definitely stay tuned for that Sheldon....
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Old 17th May 2011, 11:31 PM   #27
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Quote:
Originally Posted by woodturner-fran View Post
Will definitely stay tuned for that Sheldon....
Thanks Fran, you live in an amazingly great part of the world.


Sheldon
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Old 18th May 2011, 07:06 AM   #28
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Thanks - you too!
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Old 18th May 2011, 11:47 AM   #29
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Quote:
Originally Posted by stokessd View Post
I've got several hours of video detailing my current rebuilding techniques for both the original Quad ESL's and the ESL 63's. I need to fire up Final Cut and edit it into something for public consumption.

Stay tuned.

Sheldon



Sweet, It was your original videos that finaly got me going on building esl's in the first place.

Thanks very much Sheldon. jer
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Old 25th May 2011, 10:02 PM   #30
sheep is offline sheep  Canada
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Where are the videos?
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