review33 - 影音天地: QUAD ESL speaker

#7841 [kwanmafai], 10-11-22 20:10
Thanks Dennis and Patrick. I'm planning to buy it from online oversea since limited choices in HK. From time to time, there are some 57s or 63s from eBay or Audiogon, looking good but of course never know the condition... Try try my luck haha.

最後修改時間: 2010-11-22 20:25:08
#7842 [Pcs100], 10-11-22 22:20
My project with the Quad ESL988 has completed. Now I have the time to continue with the strip of the Quad ESL57 treble panel extracted from Dennis' ESL57.
#7843 [Pcs100], 10-11-22 22:24
Panel drilled open. severe burnt on stator noted.
#7844 [Pcs100], 10-11-22 22:26
Please note size of the burnt hole
#7845 [Pcs100], 10-11-22 22:27
Another view of the burnt holes
#7846 [Pcs100], 10-11-22 22:28
Close up view
#7847 [Pcs100], 10-11-22 22:33
No reading on diaphragm. The conductive solution on mylar has all gone! Anyway, this treble panel is beyond repair.
#7848 [Pcs100], 10-11-30 18:54
Dear weatherman hing,

I got good news for you. With the help of Dai Wok hing, We drilled open your faulty ESL57 bass panel today and find the mylar in good condition. However, the conductive coating was all faded away.

Picture shows faulty bass panel before drilling proceed,
#7849 [Pcs100], 10-11-30 18:55
Drilling in progress
#7850 [Pcs100], 10-11-30 18:58
Drilling off the rivets. There were a total of 64 rivets on one bass panel.
#7851 [Pcs100], 10-11-30 18:59
Removing the drilled rivet from the panel
#7852 [Pcs100], 10-11-30 19:02
Close up view or the wasted rivet
#7853 [Pcs100], 10-11-30 19:03
The faulty bass panel opened like a book.
#7854 [Pcs100], 10-11-30 19:05
The mylar is in good condition. Please note the conductive coating looks funny. It looks much different from a tradition manufacturing coating.
#7855 [Pcs100], 10-11-30 19:07
Resistance checking shows nil reading on mylar. That may explained the sound output was so low.
#7856 [Pcs100], 10-11-30 19:17
Both stator and mylar are in good condition. There is no need to re-mount the mylar. This bass panel can be restored by first, cleaning and removing of the old conductive solution. 2nd, apply fresh conductive coating (hand soap) at 100m ohm resistance per sq. inch.. Close up the stator and sound test. If sound test satisfactory, re-install dust cover and job done!

Special thanks to Dai Wok hing for loaning/helping me the press drill in his work shop. Thanks for his capuochino coffee. It was nice!

Will post more picture later.

Regds
Patrick
#7858 [weatherman], 10-12-01 15:29
Thank you Patrick and Dai Wok,我這個豹紋的Bass Panel，可是95年由當時Quad代理Radio People全新更換的呢！
#7859 [ken1967], 10-12-01 15:56
Seems the older stuff is more reliable then newer ^_^
#7860 [dkyyu], 10-12-01 16:19
The panel looks like locally rebuilt by radio people technician. I have never seen any original panel look like this before.
#7861 [weatherman], 10-12-01 18:47
睇番張單，當年(1995)收費，高音panel兩塊HKD 2100，低音四塊HKD 4952。
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