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This topic comprises 2 pages: 1 2
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Author
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Topic: Uneven output between xenon lamphouses
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Hillary Charles
Jedi Master Film Handler
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Posts: 748
From: York, PA, USA
Registered: Feb 2001
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posted 12-12-2012 07:31 PM
This is sort of a follow-up to a previous question regarding our 500W Kneisley L-100 (actually one is rebadged as an A.V.E. but is pretty much the same) lamphouses. By slightly altering the amperage and defocusing the brighter lamp, we were able to put on a decent show. However, now that we have the luxury of time, we'd like to get to the bottom of the problem.
Here's what the units look like: ![-](http://www.film-tech.com/uploads/uploads0503/booth1A.jpg)
One unit appears to be working fine. The light is bright and white. The projected image has great color and contrast. The other unit produces a duller picture, with a slightly bluish cast. The picture lacks that snappy contrast of the other.
We have switched the lamphouses between projectors & power supplies, and then we switched the bulbs. In every case, the problem was in the same lamphouse, REGARDLESS of the power supply and REGARDLESS of the bulb. Both bulbs perform perfectly in the "good" lamphouse, and both perform poorly in the "bad" lamphouse.
Now, what is wrong with that lamphouse? Thank you in advance.
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Paul H. Rayton
Expert Film Handler
Posts: 210
From: Los Angeles, CA , USA
Registered: Aug 2003
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posted 12-13-2012 02:33 PM
Reflectors CAN be re-silvered. The one company with which I'm acquainted is down near San Diego, CA. Optiforms, Inc. (website: http://www.optiforms.com/ ) can be a good contact for such work. They will provide quotes, and, from talking with them, it sounds like the price will be much more reasonable if it is for a reflector for which they have previously done production work. But, failing that, they can coat apparently most anything. Sales rep is Michelle Langland, m.langland@optiforms.com, tel 951-296-1300, x. 125. BTW, there is an interesting "tech vault" page at their website having to do with methods of cleaning reflectors, which may be of interest.
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