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Author Topic: The studios think people who run digital screens are morons Todd McCracken Master Film Handler Posts: 263 From: Northridge, CA, USA Registered: Mar 2008 posted 03-01-2010 03:51 PM                    Hmm, Though I only monitor the trouble reports and no longer have much to do with such issues resolutions I cant recall seeing an exploding bulb report in the last year. That does not mean it does not happen but I would say that it is uncommon from my vantage point.  |  IP: Logged Dustin Mitchell Phenomenal Film Handler Posts: 1865 From: Mondovi, WI, USA Registered: Mar 2000 posted 03-01-2010 04:12 PM                     To clarify- Bulbs that HAVE exploded have all been under warranty. We're talking at least 8 in a 12 plex and all have been of a certain brand, which I'm too much of a chicken to name Bulbs that HAVE NOT exploded have all been ran to at least double warranty with no problems. These were all Christie bulbs As far as 'Zero Cost' I am aware of lost ticket revenue, etc. I was trying to make the point that the exploding bulb issue appears to be a bulb issue rather than a digital issue and since they were under warranty repairs/parts were covered  |  IP: Logged Phil Ranucci Expert Film Handler Posts: 236 From: Carpinteria,CA, United States Registered: May 2006 posted 03-01-2010 05:01 PM                     I'm a little leery about this. A brand you won't mention didn't even make it to warranty before exploding, but you run Christies to double warranty with no problem. I don't know, but going past warranty just seems to be asking for trouble if a lamp blows. So far the Christies haven't let you down, but if the other brand had made warranty you would have kept them in with potentially expensive results. When do you change the Christies?  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-01-2010 05:06 PM                     quote: Jonathan Smith Both of those cases are obvious typos: 70dB instead of 7, 12.8fL instead of 128. Maybe its not such an obvious typo. The standard is 85db, but what they meant to type was to run the fader at 7. 70db is way too low and 7db is inaudible.  |  IP: Logged Dustin Mitchell Phenomenal Film Handler Posts: 1865 From: Mondovi, WI, USA Registered: Mar 2000 posted 03-01-2010 05:30 PM                     Phil, the Christie's get changed when they need to be; that is when the image isn't acceptable anymore. Obviously we don't let our picture get dim. I probably shouldnt' have mentioned Christie bulbs by name if I wasn't going to name and shame the sub-par bulbs, but rest assured this is a problem that has manifested itself company wide and we've stopped using these bulbs because of it. I do not know if the problem was soley the bulbs or a combination of the bulbs and projectors, all I know is that we have had no issues with Christie bulbs in our digital projectors, ever; not one explosion.  |  IP: Logged Jake Spell Master Film Handler Posts: 294 From: Johns Island SC Registered: May 2009 posted 03-01-2010 10:53 PM                     I know of someone who ran a Christie bulb in a Christie projector to over 3000 hours I believe. It was in a Cristie Projector. You really cant beat Chritie bulbs  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-01-2010 11:59 PM                     Bah! I get 8000 hours on 6K lamps all the time. Its all about using CHRISTIE bulbs in CHRISTIE equipment with really good exhaust and automation controls to ensure proper cooling. I've ran 4K lamps to 10,000 hours and 3K lamps to over 12,000 hours. That is an unobtainable feat in anything except Christie equipment. Oh yeah Strong may have been a thousand bucks cheaper to buy when the theater was new, but it isn't about the price...its about how much it costs.  |  IP: Logged Phil Ranucci Expert Film Handler Posts: 236 From: Carpinteria,CA, United States Registered: May 2006 posted 03-02-2010 12:06 AM                     Brad, I assume you're talking about film as opposed to Digital? The last thing that I want to do is lose a Barco reflector, but 1000 hours on a Ushio 4K gets expensive.  |  IP: Logged Michael Voiland Expert Film Handler Posts: 219 From: Naperville, IL US Registered: Aug 2009 posted 03-02-2010 12:52 AM                     I cant wait for the failure of digital. They are buying 4 silver screens, and "2" digital read d projectors. They will be mobile... Couple that with old general cinema belt driven roof top exhausts from the 1980s and we are good to go. But we got a bunch of cool bunch of fluff and shit in the lobby.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-02-2010 01:04 AM                     Those numbers were in film lamphouses, but I am also getting incredible hours on Christie digital SB and ZX units.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 03-02-2010 04:11 AM                     quote: Brad Miller Bah! I get 8000 hours on 6K lamps all the time. Its all about using CHRISTIE bulbs in CHRISTIE equipment with really good exhaust and automation controls to ensure proper cooling. I've ran 4K lamps to 10,000 hours and 3K lamps to over 12,000 hours Question then: If hours are obtainable with these large bulbs, how do they handle flicker unless you have almost perfect recitifers with very little ripple output... Was the light still decent enough and not muddy looking when they get of this high age? Also, you mention on getting great hours on those Christie digital units - meaning that you're getting the hours on these bulbs that are well past warranty hours and not heeding the warnings of warrany repair if the bulb lets go past warranty hours...kinda curious on this one.. I do agree though: Christie knows how to make bulbs. It's what we burn in our film consoles... thx - Monte  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-02-2010 09:52 AM                     quote: Brad Miller but I am also getting incredible hours on Christie digital SB and ZX units. No argument on Christie lamps! But I will argue on running them past warranty hours on digital equipment. Wait till you have one explode... and they do explode! Several Ushios here in SLC at other chains I don't service but hear about, one at about 300 hours. I had one 6kw go at 642 hours... The manager wasn't paying attention to the lamp change warning and could have changed the lamp out himself! It caused over 20K in damage to a CP-2000S... Reflector, Heat Filter, and of course the Blessed Dolby Color Wheel... as well as labor. It spared the integrator. The heat filter on the Christies is too thin to contain a lamp explosion from that size lamp. NEC and BARCO certainly have an added safety margin built in for the Blessed Dolby Wheel with the right angle lamphouse. The misleading part is that they say right on Christie's web page that the average lamp life for the CDXL-60 is 1000 hours... that is way beyond misleading! Pull em when the warranty hours go ding! I'm with Michael on waiting for digital to go kaput! I've gone back to mostly working on film projection systems and supporting them... they'll be around for a very long time to come and I will retire from doing that in a number of years. Unless there is some miracle there will not be an industry wide digital roll out as long as the economy is as bad as it is... and that may well take the next 10 years to turn around... I will retire before then anyway! Even once it's back in good order things will never be financially the same again for anyone. Mark  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 03-02-2010 12:21 PM                        Mark, I am really in awe of you! That is quite a change of mind from where you were on digital in the past few years. It is a sign of an open and flexible mind, and a pleasant surprise. More power to you, my friend. There was a time when I though we had lost you to becoming a totally myopic digevangelist. I assumed your mind had clamped shut on that issue; obviously that is not the case and I apologize for the assumption, even I was only thinking it to myself. So, if ever I am in your neck of the woods, I definitely would like to buy you a beer!  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-02-2010 12:40 PM                     Mark, we don't push the units with the Dolby color wheel in it. Its not financially worth risking it. The trick is in doing a regular inspection of the bulb and light on screen (throw up a white target pattern) and look for any instability. Monte, unless you are using Christie equipment, you can pretty much kiss goodbye any chance of awesome bulb hours like that.  |  IP: Logged Matt Fields Jedi Master Film Handler Posts: 545 From: Ohio, United States Registered: Jun 2005 posted 03-02-2010 02:01 PM                     Brad- What do you spec your exhausts for ZX's at?  |  IP: Logged

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