Film-Tech Forum ARCHIVE: Kniesley Kni-Tron L-100-3 lamphouse question.

This is topic Kniesley Kni-Tron L-100-3 lamphouse question. in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Josh Jones (Member # 447) on 11-12-2003, 12:29 AM:

I have one of these little suitcase-sized lamps in my screening room. having beefed up the cooling system, and some rewiring, the bulb finally quit with I think 791 hours on it. SOme have said that this lamphous requires a special 500W lamp that osram made back in the day. Will a XBO 500W/H bulb *physically* fit in this lamphouse? I'd hate to spend a grand to have a new bulb made, but if it came to that, I'd buy a new lamphouse.

Josh

Posted by Paul G. Thompson (Member # 655) on 11-12-2003, 12:48 AM:

Tis my understanding your lamp uses a bulb that was custom built for that lamphouse. I am also under the impression the last one that was custom built for your lamphouse was about 8 years ago. I don't think you have the custom bulb in that thing. That's probably why it failed so soon.

Although Josh, Brad, and Gordon are fully aware of that, my question is what the hell was so special about the custom bulb as compared to the standard XBO500W/H in the first place?

Seems kind of dubious to me.

Posted by Manny Knowles (Member # 1171) on 11-12-2003, 12:58 AM:

I find it interesting that a 500W lamp should cost $1,000.

Josh -- Just buy yourself a DVD player, a 31" TV and a nice home-theatre system built around a Denon receiver. I guarantee you'll get more bang for the buck. How often do you run movies in 35mm, anyway?

These kids today. Honestly!

Posted by Paul G. Thompson (Member # 655) on 11-12-2003, 01:04 AM:

Manny, that was what it might cost to have a custom bulb manufactured providing the orginal specifications are still within the archives of the manufacturer.

Posted by Michael Schaffer (Member # 1204) on 11-12-2003, 02:25 AM:

Ckeck the Osram website. http://www.osram.com/products/photo_optic/discharge/xbo.html
The physical dimensions are quite detailed, it doesn`t say what the pin diameter is, though.
You might also consider contacting Superior Quartz. They have a wide range of lamps available, and they have been known to make lamps for specific applications.

Posted by Richard Fowler (Member # 893) on 11-12-2003, 05:29 AM:

The very early L-100 units used a headlight type of bulb with internal reflector. Kneisley later supplied a reflector and fittings so a 500W/H bulb or equal would fit.

Posted by Gordon McLeod (Member # 33) on 11-12-2003, 09:39 AM:

Kinoton also built a lamphouse using the same reflector styled lamp until Osram discontinued it
The problem with some of them was that
1 the bushing for the cathode support soesn't fit right
2 The cooling in the system was designed for a sealed beam unit that didn't require an airstream across the seals
Bottom line there are many ORC M1000's and Strong Lumex's still kicking around that would be a better and more servicable lamphouse

Posted by Josh Jones (Member # 447) on 11-12-2003, 12:39 PM:

there is just one problem, there is absolutely no more room, as I'm using a donkey pedistal, and if the lamp were any longer I would have to crawl through the machine to get to the operator side.

Josh

Posted by John Hawkinson (Member # 1135) on 11-12-2003, 01:06 PM:

Michael said, "The physical dimensions are quite detailed, it doesn`t say what the pin diameter is, though."

Actually, the specifications: "Cathode: SFa 15-10" and "Anode: SFa 16-8" do indeed define the pin diameter (and more). You can find the dimensions somewhere on Osram's web site, I think it's in their full bulb catalog that there is a section defining those connector types. If someone actually needs this and cannot find it, I can dig it up...

--jhawk