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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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The cement used to fix the UV filter glass discs to the front of dichroic
lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#2
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"N_Cook" wrote in
: The cement used to fix the UV filter glass discs to the front of dichroic lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ Probably a UV-curing cyanoacrylate,or it could be an optical epoxy. Edmund Scientific (edsci.com) has UV curing optical glues.(not cheap) -- Jim Yanik jyanik at kua.net |
#3
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![]() "N_Cook" wrote in message ... The cement used to fix the UV filter glass discs to the front of dichroic lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ http://www.infoplease.com/ce6/sci/A0851590.html |
#4
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Charles wrote in message
... "N_Cook" wrote in message ... The cement used to fix the UV filter glass discs to the front of dichroic lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ http://www.infoplease.com/ce6/sci/A0851590.html I think you're right. I'd forgotten about waterglass. Once you make a purchase under the lamp cover disc it comes away fairly easily. I did not realise that waterglass can tolerate such high temperatures - even a major non-sand component of foundry casting sand even. I'd forgotten I used it a long time ago to stick a glass patch over a bullet hole in a sheet of window glass, otherwise I've just used for disguising scratches on 'scope CRT screens. Incidently there must be some medical use for it as I got a pint of it from a dispensing chemist. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#5
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On Dec 15, 12:24*am, "N_Cook" wrote:
[about filter plate on high intensity lights] I think you're right. I'd forgotten about waterglass. Once you make a purchase under the lamp cover disc it comes away fairly easily. I did not realise that waterglass can tolerate such high temperatures - Isn't waterglass brittle and corrosive (etching the glass as it adheres)? I think a flexible high temperature adhesive like RTV silicone is a better prospect, and more likely. Dichroic reflectors and UV or 'heat absorbing' glass are typically used on projector lamps which get quite hot, the thermal cycling would fracture a hard adhesive. |
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