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Author Topic: Orc 1000 questions John Eickhof Jedi Master Film Handler Posts: 588 From: Wendell, ID USA Registered: Jan 2000 posted 02-02-2016 10:11 PM                        Louis, You may be spot on! The 400Hz may have been for the igniter circuit? And if you look at how over-regulated all of ORCs early power supplies were, they may have indeed regulated the ship's own high current 28 volts to the lamp, this would explain the simplicity of the little lamphouse. The lamp I have is a X2500 with a 220V 1ph 60Hz supply that has a multitude of regulator transistors in it with an elaborate control board circuit and it is badged 'CINE X35' the same with my early XM-1000. Around 1971 they badged them with the typical silver 'ORC' badge. About the same time they moved their mfg facilities from Monrovia to Azusa California.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-02-2016 10:28 PM                     That lamp on the bottom is length reversed from the lamp on top. It may well screw in place and the positive lead connect to the ignitor but it probably isn't going to ever come into proper focus... Mark  |  IP: Logged John Eickhof Jedi Master Film Handler Posts: 588 From: Wendell, ID USA Registered: Jan 2000 posted 02-03-2016 09:12 AM                        What are you referring to Mark? The lamps I am talking about are identical as for bulb placement and polarity with the anode forward or away from the reflector. The only reversed lamps I know of are used in the xenon super troupers. The ORC aircraft spots used a very thick beam alignment lens with a dichroic coating around the outer 20% of the lens circumference this lens made the beam of light spread at approx 2-3 degrees so the effective length of the beam was 300-500 feet.  |  IP: Logged Jim Henk Master Film Handler Posts: 364 From: San Diego, CA Registered: Feb 2006 posted 02-03-2016 03:16 PM                     If they were used in aircraft and helicopters, how did they keep from popping left and right with all that vibration? I mean they pop in booths in lamp houses that are completely stationary. And it's not like replacing them is as cheap as a $1.29 screw-in incandescent bulb. I'd think that xenon bulb costs would add up real quick. Not to mention having to replace them conceivably in-flight. Now there's a thought to give you nightmares.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-03-2016 03:25 PM                     The original HS lamps were designed to be very rugged and no incandescent lap would be focus-able or as powerfull as the small xenons in search light applications  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 02-03-2016 06:41 PM                     They make xenon type headlights for cars. Although it's not exactly the same thing, it is similar. My point is proof of concept. If they can make a headlight for a car that doesn't self destruct from shock or vibration, they can probably make one that can be used as a searchlight on a military vehicle.  |  IP: Logged

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