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Author Topic: A testimonial for Superior lamps Dennis M Dow Jr Expert Film Handler Posts: 141 From: Bloomfield NJ USA Registered: Oct 2003 posted 10-19-2003 05:08 PM                       My theater used a 2000W from superior and got almost 5500hrs before it started to flicker  |  IP: Logged Dennis J. Losco Film Handler Posts: 39 From: Phillipsburg, NJ, USA Registered: Jul 2002 posted 02-12-2004 02:26 PM                        I though you guys would like to know that the Superior's 4KW has just been officially approved by IMAX Corp. If you would like a copy of this letter from IMAX, please let me know and I can fax a copy to you.  |  IP: Logged Josh Jones Redhat Posts: 1207 From: Plano, TX Registered: Apr 2000 posted 02-12-2004 06:25 PM                        I came into work today and proceeded to start the 5 o'clock show. The lamp tried and tried to strike, by the time it finally did, 5 minutes later, I was nearly deaf from the igniter! Running Osram 3K in a Strong Ultra 80 lamphouse. She runs at 100Amps, 24 Volts. Bulb currently has 1800 hours on it. We need a recomendation, as we have a film festival coming up and we dont want to look bad. Josh  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-12-2004 08:33 PM                     What was the no load voltage?  |  IP: Logged Aaron Sisemore Flaming Ribs beat Reeses Peanut Butter Cups any day! Posts: 3061 From: Rockwall TX USA Registered: Sep 1999 posted 02-12-2004 10:00 PM                     Isn't 4kW a little low for illuminating IMAX screens? -Aaron  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 02-12-2004 11:55 PM                        I'd think that 1800 hours is kind of pushing the limit with 3k bulbs. The general consensus here (which I agree with) seems to be that Osram, Superior Quartz, and Christie bulbs are all very good. And, yes, I'm wondering about the 4k IMAX system. Is this for the smaller SR projectors? What size screen?  |  IP: Logged Dick Vaughan Phenomenal Film Handler Posts: 1032 From: Bradford, West Yorkshire, UK Registered: Jul 2000 posted 02-13-2004 02:52 AM                        Aaron For 2D IMAX screens up to about 65 feet wide 4-4.5kW lamps are fine. Our original projector ran with these for 14 years  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 02-13-2004 03:05 AM                     Dennis, please update your profile to a valid email address.  |  IP: Logged Chris Hipp Phenomenal Film Handler Posts: 1462 From: Mesquite, Tx (east of Dallas) Registered: Jul 2003 posted 02-13-2004 03:22 AM                     quote: I'd think that 1800 hours is kind of pushing the limit with 3k bulbs. Here lately with Osrams it has been hit and miss. Currently I have a 3k bulb at about 2400 hours and it is still running strong. Two weeks ago I had one under 1500 hours that got VERY dim all the sudden, I'm assuming it was a slow leak. Generally you should be able to run a 3k osram to about 2500 hrs, I wouldn't push it much further.  |  IP: Logged Jeff Taylor Jedi Master Film Handler Posts: 601 From: Chatham, NJ/East Hampton, NY Registered: Apr 2000 posted 02-13-2004 07:53 AM                     When I started this thread eons ago it was to acknowledge Denny and SQP for cloning the 250 and 350 watt xenons used in 16mm Elmo and Eiki machines so that those of us who use them would have an alternative to overpriced and increasingly unreliable factory supplies. One issue that did come up was that the initial run of 350's that Denny produced did fine in the machines with switcher supplies, but wouldn't ignite in some of the older models designed for the same lamp with high reactance supplies. Denny solved the problem by tinkering with lamp pressure (he indicated he likes to go a little higher on pressure than some manufacturers to maximize the quality of light) and arc gaps, but I was surprised that if a switcher and a conventional power supply are set for the same voltage and amperage, the switcher has an easier time firing a given lamp. Any thoughts?  |  IP: Logged Dennis J. Losco Film Handler Posts: 39 From: Phillipsburg, NJ, USA Registered: Jul 2002 posted 02-13-2004 08:29 AM                        To start the IMAX uses both a 4kw and a 7kw in some of their smaller screen's. We are actually seeing a switch within the industry, by IMAX, to the smaller (SR) systems. We currently have the 7k's in test and hopefully will be approved by summer. Josh, There are three things we can look at: #1 - Is there a lamp issue? Probably not. 1800 hours is fairly high regardless of lamp manufacturer. So #2 - Next you would need to measure the no load voltage of the supply to see if this is a problem. #3 - What is the condition of the ignitor. Regarding the life of a 3kw lamp, Superior warrants the lamp up to 1800 hours. We tell customers that average useful life for this lamp is 25% beyond warranty (2250 hours). Hi Jeff, yea we are a little confused on why a switcher would ignite easier than the high reactance. Is there a difference in the no load voltage? Are they different ignitors? Somewhere there must be a difference.  |  IP: Logged Ken McFall Jedi Master Film Handler Posts: 615 From: Haringey, London. Registered: Apr 2001 posted 02-13-2004 03:52 PM                     Osram 3k lamps are rated at 1500 hrs.... + 25% = 1875 hrs. I'm currently about 2500 for six 3k lamps. Not because I'm trying to save money.... more to spread the lamp change more evenly over the year. I recently had to buy 3 X 4k and a month later 6 X 3k. I had some explaining to do despite the support of lamp meter readings! So I'm trying to spread the 3k's out a bit as they all do similar hours each week and currently all fall due at the same time.  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 02-13-2004 04:58 PM                        Switchers usually output a much higher no load voltage. While most HRPS have a voltage of 80-100VDC, many switchers have 120-150VDC. I have even seen one or two with 210VDC. Probably the igniter has a voltage sensing device to trigger it and it is triggered immediately by the switcher while the HRPS probably just comes within range of the triggering voltage. But you can adjust the sensitivity of many igniters.  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 02-22-2006 12:32 PM                 It has been 739 days since the last post.  |  IP: Logged Jeff Lacey Film Handler Posts: 54 From: Canton, MI, USA Registered: Jun 2005 posted 02-22-2006 12:32 PM                     Hey everyone, I am about to switch brands from Osram to Superior. Is the quality still there from a few years back? Anyone have any issues with these bulbs? Myself, I really like the Osrams, but the owners want a more cost effective bulb... Thanks for any advice you can give.  |  IP: Logged

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