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Author Topic: Xenon Amperage Range Hillary Charles Jedi Master Film Handler Posts: 748 From: York, PA, USA Registered: Feb 2001 posted 11-09-2012 02:40 PM                     We have a pair of old Kneisley (Kni-Tron) 500w lamphouses, and are curious about the allowable amperage for the lamps. The instructions we have tell us that 28 amps is the absolute highest, but nowhere can we find there, or with the online lamp specs, how much lower it can go without doing damage to either the lamp or lamphouse. One of our lamps is brighter and we'd like to attenuate the current, but not at the expense of any equipment damage. Thank you!  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 11-09-2012 02:46 PM                     Take 80% of the 28 amps to be the recommended range, but if having new bulbs in both units (Are these the Kneisley "Pups"?) to be the same. No two bulbs will be the same lumen output via the meter, but there is a simple test to do: 1- Strike up both lamphouses and set both lamps to 22 amps. 2- Check reflector focus and other alignments to bulb. 3- Ensure that bulb is in alignment with the lens and aperture. Check for lens if burnt or yellowing - this will definitely cause even light issues. 4- Turn on projectors, switch the dousers between machines and adjust current on one lamphouse to go with the darker lamphouse to get your even field of light. There are other factors in play like in the steps above before we do the amperage change, but for a quick fix, this is a good start.  |  IP: Logged Robert Throop Master Film Handler Posts: 412 From: Vernon, NY USA Registered: Jun 99 posted 11-09-2012 04:00 PM                     quote: Monte L Fullmer (Are these the Kneisley "Pups"?) I don't believe these are the "Pup". These are the smaller 500w lamphouse that used the integrated bulb/reflector.  |  IP: Logged Hillary Charles Jedi Master Film Handler Posts: 748 From: York, PA, USA Registered: Feb 2001 posted 11-09-2012 05:06 PM                     Thanks Monte, that sounds like the plan! FWIW, the model lampouse is the L-100-3.  |  IP: Logged

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