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Author Topic: Orc 1000 questions Erik Lallucci Film Handler Posts: 31 From: Webster, NY / USA Registered: Feb 2013 posted 06-01-2015 05:52 PM                     I'll be picking up an ORC 1000 lamp house soon and have a couple of questions about it. As I understand from reading other posts, it is rated for a 700w bulb. I have a new 750 that I would probably install if that would work? Also. I am reading it doesn't have a switch to keep the fan running after the lamp is turned off? That seems like a really poor design if that is the case. I always run the fan for at least ten minutes on any xenon to prolong its life. Has anyone created a three way switch. Off , fan , lamp? Or separate switches on the unit? Any advice on these units is well appreciated. Thanks. Erik  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 06-01-2015 07:26 PM                    If it's physically the same bulb as the 700 it should be fine. The OSRAM version of the 700 would be XBO700W/HS-OFR. There is a screw end plus a couple of points sticking out where one can use the slots in the rigid plastic safety shield to screw it in without putting any stress on the bulb itself. (Not sure if that is standard on all brands.) When I worked at a post production center with several screening rooms we had a number of these lamphouses but they were buying the 1000W version of the bulb but as this lamphouse would trip out over 40A, the bulbs would develop arc waver (seen as flicker on screen) later in life and had to be changed prematurely. Switching to 700's cured that. I don't think 750 is that much of a difference to be a problem. In our case, when we changed to different lamphouses in our larger room, we had a ready supply of half-used 1K bulbs which no longer wavered once sufficient current could be applied.  |  IP: Logged Erik Lallucci Film Handler Posts: 31 From: Webster, NY / USA Registered: Feb 2013 posted 06-01-2015 07:37 PM                     Thanks Steve. I appreciate the info.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 06-01-2015 09:32 PM                        The fan is 120 volts. Cut it loose and wire it across the incoming line so that it will always be on. ORC had a semi-fraudulent labelling system: Model 1000 ran 700 watts; Model 1600 ran 1000 watts, Model 2000 ran 1600 watts; Model 2500 ran 2000 watts; Model 3000 ran 2500 watts; Model 4000 ran 3000 watts; Model 6000 ran 4000 watts. Easy to snow a non technical owner who wanted a big lamp for cheap money.  |  IP: Logged John Eickhof Jedi Master Film Handler Posts: 588 From: Wendell, ID USA Registered: Jan 2000 posted 06-01-2015 09:54 PM                        depending on where it lived there is a good possibility that the factory mod was made to it providing a separate fan switch. I applied the mod to dozens of them in the 1970s. Louis is correct, as long as the lamp is a 700 or 750 W/HS type it should fit. You can also use an HS=C with anode cable too just remove the existing anode lead. make sure the cable is clear of any metal or it will arc out when the igniter is energized.  |  IP: Logged Erik Lallucci Film Handler Posts: 31 From: Webster, NY / USA Registered: Feb 2013 posted 06-02-2015 05:57 AM                     Always helpful information here, thanks guys!  |  IP: Logged Mitchell Dvoskin Phenomenal Film Handler Posts: 1869 From: West Milford, NJ, USA Registered: Jan 2001 posted 06-02-2015 09:10 AM                     > I am reading it doesn't have a switch to keep the fan running after the lamp is turned off? I modified a few of these over the years so the fan stayed on as John Eickhof suggests. I also drilled through the back to add a toggle switch to turn off the fan. The easier method is when you turn off the lamp, pop the fuse holder cover on the back which will disable the igniter and then turn it back on to restart the fan.  |  IP: Logged Sean Weitzel Jedi Master Film Handler Posts: 619 From: Vacaville, CA (1790 miles west of Rockwall) Registered: Dec 1999 posted 06-02-2015 12:14 PM                     If the control boards inside haven't been recently re-capped you might want to consider doing that as the intense heat tends to cook the boards over time. Mine wasn't reliably igniting and recapping the control board cured it.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-03-2015 02:48 PM                     What Sean said. And installing 85 amp stud mount diodes also makes them totally reliable. The originals were only like 35 amp. Do the blocking diode too. Mark  |  IP: Logged John Eickhof Jedi Master Film Handler Posts: 588 From: Wendell, ID USA Registered: Jan 2000 posted 06-03-2015 07:25 PM                        If the SCR board has a single SCR on it it needs to be replaced with the later board with two SCRs and if you want more than 40 amps you will need to replace the press in SCRS with higher capacity types. (Originals were only 35 amp rating) Good luck finding them! All lamp current runs through the SCRs and the #10 lead wires so be careful!  |  IP: Logged Paul Gordon Jedi Master Film Handler Posts: 580 From: Ottawa, Ontario, Canada Registered: Aug 2005 posted 06-04-2015 05:46 AM                        I had to get mine recapped this year as the bulb would not strike. I do have an extra switch to turn the bulb off but leave the fans on, see picture.  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 06-05-2015 02:34 AM                    Weren't there at least two version of that board, with either a triac or dual SCRs? I don't know that higher rated SCRs (or triac) is going to get you over 40A lamp current. Are you sure about that? They are on the primary side so if they are rated at 35A, that's plenty. Remember the whole thing will run on a 20A outlet.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 06-05-2015 07:06 AM                     Come on people...you have a long way to go before you get up to all 1000 questions about ORC that this thread boasted!  |  IP: Logged Erik Lallucci Film Handler Posts: 31 From: Webster, NY / USA Registered: Feb 2013 posted 06-05-2015 08:18 PM                     Again, thank you all for the info on this. I just picked up the lamphouse and I see that it was installed with a 1000w ORCON xenon that looks way past it life. I am just concerned I may have the wrong 750 watt bulb? I have a spare USHIO uxl 800y 750w on hand. Thanks  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 06-09-2015 08:23 PM                     Yes, that is the wrong lamp. It doubt that it will fit. Even if the thread is the same (unlikely) and you can figure some way to tighten it (the original lamp case is a plastic tube that engages those pins and is used as a wrench), in the image it looks like the distance from cathode base to arc gap looks different. The cable is no problem if it reaches to what the ORC cable clamp attaches to.  |  IP: Logged

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