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Just bought a (1970) pair of ESL-57s
Just bought a (1970) pair of ESL-57s
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Old 23rd April 2013, 03:22 PM   #1
diyapril is offline diyapril  United Kingdom
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Question Just bought a (1970) pair of ESL-57s

I have just taken delivery of a pair of Quad ESL-57s dating from 1970. Is there anything I ought to do / check before switching them on? I will be using them with a Quad 33/303 combination and Technics SL1210.
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Old 23rd April 2013, 04:44 PM   #2
SY is offline SY  United States
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Just bought a (1970) pair of ESL-57s
Lucky you!

Visually check the rectifier stack for the HT supply, and gently vacuum away any dust. Look for holes in the dust cover films. Then fire 'em up and see if they make noise!
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Old 23rd April 2013, 11:06 PM   #3
diyapril is offline diyapril  United Kingdom
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Forgive my ignorance, but how do I "visually check the rectifier stack for the HT supply"; what am I looking for?

Thanks anyhow for the reply, I should be able to handle the vacuum cleaner bit - just so long as my wife doesn't catch me.
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Old 23rd April 2013, 11:16 PM   #4
SY is offline SY  United States
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Just bought a (1970) pair of ESL-57s
You want to see if it's burned-looking. You'll probably want to replace it anyway, and the good news is that replacement HT supplies aren't too expensive.

Here's some nice pix, including the holes I was talking about:

Quad ESL-57 repair by Hey You

Source for repairs and replacement parts- I know this guy pretty well, his restorations are terrific. The site is worth poking around.

QUAD ESL 57 repair and refurbishment
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