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Author Topic: Angle Effect on Bulb
Bill Enos
Film God

Posts: 2081
From: Richmond, Virginia, USA
Registered: Apr 2000


 - posted 10-26-2004 06:53 PM      Profile for Bill Enos   Email Bill Enos   Send New Private Message       Edit/Delete Post 
What effect does our 14 degree projection angle have on xenon life and stability. 3000W at 93 amps Superior, rotating at 250-300 hrs. in Kneisley 4000 watt lamp with 2 blowers, one on each end of the bulb, more than adequate exhaust.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99


 - posted 10-26-2004 08:27 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Thats a bit of a down tilt and I'd be far more concerned about all the keystoning in the image.

To rotate or not..... I usually advise not to and have never seen any detrimental lamp life resulting. Lamp envlopes don't blacken like they used to before the "Getter" days and the electrodes are much more stable over time as well. With the lamps left alone I have customers getting 13K hours regularly with Christie 2K lamps(not by my choice!). This way the relfectors, blowers and other stuff gets attended to by a real technician instead of a booth mongral. I suppose to rotate or not is good subject for another thread......
We have a 6 screen drive in here in town that runs 4K Christie lamps to about 4K hours without rotation. Go figure.......

Mark @ CLACO

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Ian Joseph Parfrey
Film Handler

Posts: 56
From: Bollier Queensland Australia
Registered: Sep 2004


 - posted 10-27-2004 05:07 AM      Profile for Ian Joseph Parfrey   Email Ian Joseph Parfrey   Send New Private Message       Edit/Delete Post 
How would angle affect verticals, and what would the max angle be?

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 10-27-2004 05:31 AM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
The technical specifications for each lamp usually specifies the recommended range of angles from the horizontal or vertical, and whether magnetic stabilization is needed.

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