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Author Topic: RCA 9050 - late SH1000 lat guide roller retrofit Sean R. Custer Film Handler Posts: 35 From: San Francisco, CA, USA Registered: Dec 2005 posted 02-11-2007 02:48 PM                        Curious to find out if anyone has met with success in retrofitting the Sh-1000 parts that are still available to RCA 9050s. The point of this being: that old 9050 metal roller long-since replaced with the early Sh-1000 felt roller (Sh-2043) which is seemingly unobtainable. This is the shouldered style. I'd like to fit Sh-2050 felt roller (unshouldered) in the 9050, and am hoping to avoid having to swap the whole ass'y flange-flange w/ late model sh-1000 parts. Looks like at the very least i need a shaft & to fabricate some spacers; wondering what else. thanks in advance for any thoughts  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-11-2007 03:39 PM                        Bearings are the same. Shaft diameter is the same. I have had no problem with all parts from Wolk. Louis  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-11-2007 04:13 PM                     Felt rollers are eons out of production unless you happen to have a N.O.S. part laying around. The only ones available are the rubber style... Wolk has all the parts for both Simplex and RCA lateral guide roller assys. and remember the best roller is no roller at all. You can actually do without any roller in there but start up time is just longer... not really a problem though. Mark  |  IP: Logged Sean R. Custer Film Handler Posts: 35 From: San Francisco, CA, USA Registered: Dec 2005 posted 02-11-2007 06:31 PM                        Thanks for the response, Didn't think I could do the '5-star roller remove trick' since these don't have the variable tension roller. We're pretty much strictly stereo so I'm loathe to experiment; but if that's not the case... I think we go thru LaVezzi; didn't know Wolk was still around. Used to have Brekerts so I'm sure we've done Wolk before.  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 12-19-2010 08:55 PM                 It has been 1407 days since the last post.  |  IP: Logged Victor Liorentas Jedi Master Film Handler Posts: 800 From: london ontario canada Registered: May 2009 posted 12-19-2010 08:55 PM                     Sorry to resurrect this thread but... Mark,are you saying i could remove the dirt embedding rubber roller on my SH1000s and run fine without putting in the metal rollers which Joe Redifier explains in the tips section of the forum?  |  IP: Logged Victor Liorentas Jedi Master Film Handler Posts: 800 From: london ontario canada Registered: May 2009 posted 12-21-2010 12:17 AM                     The thing is i am getting an a&b chain performed and would like to remove the rubber roller before this if it's feasible to do so! The question was directed to Mark Gulbrandsen because of his comment above but if anyone else has knowledge of this...  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 12-21-2010 07:59 AM                        My understanding is that this could only work on the 5 star. The 9030 and sh-1000 use the same style of arm, but the rest is different. I assume that will not work on them. Louis  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 12-21-2010 11:40 AM                     It absolutely works on the 5 Star, as I've converted lots of them (I think I was the first). As far as the SH1000 type, I've only been told it won't work (I believe it was Gordon). I've never actually tried it.  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 12-21-2010 12:53 PM                        I don't think it would work very well on the SH1000 because there is no tension applied to the film. The friction (dirt embedding) roller is what keeps the film steady by the scanner in that soundhead. You can get away with removing it on the 5-Star because the tension roller below keeps everything in check and sounding good.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-21-2010 01:59 PM                     However, even on a 5-star, it slows the ramp up speed for changeovers to the point of flutter at changeover. If the drum on the Simplex was flat across so that at the guide roller could apply pressure to the edges of the film to the drum, this mod would work better. -Steve  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 12-21-2010 03:45 PM                        With the roller in place it takes a few seconds for the 5-star to settle. With the mod there is little to no bowing of the film between the drum and the tensioner no matter how you position the it (so long as it has some tension). Both completely settle just fine within 5 seconds.  |  IP: Logged Victor Liorentas Jedi Master Film Handler Posts: 800 From: london ontario canada Registered: May 2009 posted 12-21-2010 03:54 PM                     I wish it would work on the SH1000  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-21-2010 08:52 PM                     It doesn't bow because it is slipping, not because it is up to speed. -Steve  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 12-22-2010 12:13 AM                     Joe, thread one up on your next shift with the tension roller in the halfway position. Upon starting the projector it will bulge at the sound drum. Once you see the bulge start to retract you have hit speed.  |  IP: Logged

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