Quad ESL 57 panel refurbish: DIY or not? - Page 4

Franz Gysi · 27th November 2012, 04:18 PM

Two years later, I feel very happy using this neon bulbs as indicator.

Last saturday, I found the neon bulbs constantly glowing!

I opened the backcover and found some dust bridges between the psu and the backcover (I did not mould the psu in wax, it is open).

After removing the dust (sorry, I should have made a picture), the bulbs are flashing now every two seconds.

The panels are beginning to leak. I will have a closer look at it soon. Maybe now it's time to refurbish the panels?

Franz

Fabien Lefebvre · 29th November 2012, 09:33 AM

Quote:

Originally Posted by Franz Gysi

Two years later, I feel very happy using this neon bulbs as indicator.

Last saturday, I found the neon bulbs constantly glowing!

I opened the backcover and found some dust bridges between the psu and the backcover (I did not mould the psu in wax, it is open).

After removing the dust (sorry, I should have made a picture), the bulbs are flashing now every two seconds.

The panels are beginning to leak. I will have a closer look at it soon. Maybe now it's time to refurbish the panels?

Franz

Before re-furbishing everything, if your only problem is some not-severe leakage, you can just remove the dust cover and re-insulate the outter part of the stator with serious tape (black 3M).

Franz Gysi · 04:06 PM

Thanks for this advice, Fabien

You recommended me the same procedure two years ago :-)

I plan to do this during Christmas Holiday.

Franz

/Edit (add a Picture)

Fabien Lefebvre · 29th November 2012, 08:01 PM

You mean you already did that 2 years ago and this happens again ?

Franz Gysi · 30th November 2012, 04:13 AM

No, I didn't

Fabien Lefebvre · 30th November 2012, 07:29 AM

Quote:

Originally Posted by Franz Gysi

No, I didn't

So maybe time to try it.
You will probably notice at that time that the current tape which is applied has aged.

triode_al · 30th November 2012, 05:37 PM

Quote:

Originally Posted by Fabien Lefebvre

(black 3M).

Can you say more about the Black [magic] tape?
3M has hundreds, maybe thousands types of tape

albert

Fabien Lefebvre · 30th November 2012, 07:11 PM

Quote:

Originally Posted by triode_al

Can you say more about the Black [magic] tape?
3M has hundreds, maybe thousands types of tape

albert

I am using one or two layer of the classical electric black tape (3M) + 2 layers of the thin transparent tape used for parcels.
The black tape covers the rivets themselves, not the sides.
Take care that if too thick, it will be harder to install back in the frame.

Franz Gysi · 05:29 PM

Fabien

I am a happy guy as I got an old spare bass panel some weeks ago. It has severe oxidations and the dustcover is damaged.

I can use this panel to explore the construction in detail before I work on my other panels.

Franz

Bazukaz · 2nd December 2012, 09:29 PM

Hi,

I have Quad 57's with serial numbers 21258 & 21253. I guess these should have clamping boards for treble units. I have disassembled one speaker for investigation & power plug replacement but cannot see a clamping board anywhere. Is it within transformer casing or its missing?

Regards,
Lukas.

29th November 2012, 03:58 PM	#33
Franz Gysi diyAudio Member Join Date: Oct 2007	Thanks for this advice, Fabien You recommended me the same procedure two years ago :-) I plan to do this during Christmas Holiday. Franz /Edit (add a Picture) Last edited by Franz Gysi; 29th November 2012 at 04:06 PM.

29th November 2012, 08:01 PM	#34
Fabien Lefebvre diyAudio Member Join Date: Feb 2004 Location: Caen - France	You mean you already did that 2 years ago and this happens again ? __________________ Quad fan ! One hobby: re-build ESL 57

1st December 2012, 05:19 PM	#39
Franz Gysi diyAudio Member Join Date: Oct 2007	Fabien I am a happy guy as I got an old spare bass panel some weeks ago. It has severe oxidations and the dustcover is damaged. I can use this panel to explore the construction in detail before I work on my other panels. Franz Last edited by Franz Gysi; 1st December 2012 at 05:29 PM.

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27th November 2012, 04:18 PM	#31
Franz Gysi diyAudio Member Join Date: Oct 2007	Two years later, I feel very happy using this neon bulbs as indicator. Last saturday, I found the neon bulbs constantly glowing! I opened the backcover and found some dust bridges between the psu and the backcover (I did not mould the psu in wax, it is open). After removing the dust (sorry, I should have made a picture), the bulbs are flashing now every two seconds. The panels are beginning to leak. I will have a closer look at it soon. Maybe now it's time to refurbish the panels? Franz

30th November 2012, 04:13 AM	#35
Franz Gysi diyAudio Member Join Date: Oct 2007	No, I didn't

2nd December 2012, 09:29 PM	#40
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	Hi, I have Quad 57's with serial numbers 21258 & 21253. I guess these should have clamping boards for treble units. I have disassembled one speaker for investigation & power plug replacement but cannot see a clamping board anywhere. Is it within transformer casing or its missing? Regards, Lukas.

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