my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » HELP!! Black and blue bulbs (Page 2)

This topic comprises 4 pages: 1  2  3  4

Author Topic: HELP!! Black and blue bulbs Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 01-14-2002 09:18 PM                     The lamp in question has had a seal failure and that causes the cloudy blue black and the zoned colur shift If one looks closly the stem of the electrode to the right has also turned blue in the photo and the end with the cable the end caps are goldish tinted which usualy points to that seel as being the one that failed. Also the discoloured section indicates it was hot. I have had problems with the anode end ( I assume it is to the right) overheating in some xetron lamphouses due to the focusing. There was a spider arangement to heatsink the lamp at the anode end if my memory is correct that was absent in the lamphouses inquestion  |  IP: Logged Will Kutler Phenomenal Film Handler Posts: 1506 From: Tucson, AZ, USA Registered: Feb 2001 posted 01-14-2002 09:22 PM                     I believe that the bulb elecrtrodes are tungsten.  |  IP: Logged Jerry Chase Phenomenal Film Handler Posts: 1068 From: Margate, FL, USA Registered: Nov 2000 posted 01-14-2002 09:53 PM                       What is the blue? I don't uderstand why a bad seal would cause a blue color. This is one of those questions about useless trivia that drive me nuts until I know the answer.  |  IP: Logged Tom Ruhling Film Handler Posts: 4 From: Germantown, MD, USA Registered: Nov 2001 posted 01-15-2002 12:06 AM                     Here is some more info on the bulb. The previous bulb ran 1500+ hours before removal. The one that turned on George and I, as stated, had only 137 hours on it. I will add that very only minor horizontal change in the bulbs focus was made after installation. It struck up and worked great for the first fifteen minutes prior to its failure. The failure happened almost instantly. The 1500+ hour bulb is back in until I get a new one. It has loged an additional 43 hours and is doing fine. Tom  |  IP: Logged Adam Martin I'm not even gonna point out the irony. Posts: 3686 From: Dallas, TX Registered: Nov 2000 posted 01-15-2002 02:45 AM                     The blue deposits are probably tungsten oxide, which will be yellowish or dark blue depending on the amount of oxygen in the molecule. The degassed lamps I've seen have always been a hazy white color. I've never seen one with such a pretty blue color. Must have something to do with the amount of heat, as the blackened hotter end of the lamp would be inside of the reflector.  |  IP: Logged Jerry Chase Phenomenal Film Handler Posts: 1068 From: Margate, FL, USA Registered: Nov 2000 posted 01-15-2002 12:22 PM                       Thanks Adam. I've only seen the black or cloudy grey deposits myself.  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 06-28-2002 07:18 PM                     The lamp to which I am referring (in "Xenon - Premature Failure") doesn't have this pretty blue color, nor does it have the bands of color. Instead, it is just a general dark cloudy mess. I will take a picture of it tomorrow and post for your review.  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 02-17-2010 12:44 PM                 It has been 2790 days since the last post.  |  IP: Logged Jeremy Jorgenson Phenomenal Film Handler Posts: 1002 From: Chicago, IL, USA Registered: Feb 2005 posted 02-17-2010 12:44 PM                        This happened to me last night. 5K Christie in a Neumade lamphouse. It had 318 hours.  |  IP: Logged Richard Hamilton Phenomenal Film Handler Posts: 1341 From: Evansville, Indiana Registered: Jan 2000 posted 02-17-2010 01:48 PM                     Smurffs making a comeback?  |  IP: Logged Jeremy Jorgenson Phenomenal Film Handler Posts: 1002 From: Chicago, IL, USA Registered: Feb 2005 posted 02-17-2010 02:03 PM                        Oh, maybe it's Avatar envy?  |  IP: Logged Demetris Thoupis Phenomenal Film Handler Posts: 1240 From: Aradippou, Larnaca, Cyprus Registered: Apr 2001 posted 02-17-2010 03:12 PM                     Solution is easy. Use Ushio!  |  IP: Logged Chris Slycord Film God Posts: 2986 From: 청주시, 경북도, South Korea Registered: Mar 2007 posted 02-17-2010 03:48 PM                     Unless Demetris is trying to be funny, aren't Christie bulbs made by Ushio? Most I've seen even have documents inside the box referring to Ushio  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-17-2010 04:03 PM                        Everyone has problems with leakers, especially at high wattages due to the large mass of electrodes. UPS/Fed Exp is the problem. Louis  |  IP: Logged Jonathan Althaus Master Film Handler Posts: 435 From: Bedford, TX Registered: Dec 2008 posted 02-17-2010 04:23 PM                     Christie=Ushio. And we've had some issues incompany with exploding Ushio's/Christie's, but all at the 5k or higher range. From my limited experience, I've never had one of their bulbs fail to meet the warranty hours, but we only use 2.5 and 3k's.  |  IP: Logged

All times are Central (GMT -6:00)

This topic comprises 4 pages: 1  2  3  4

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.