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Author Topic: Proper Milliamp setting for Kelmar LED reader. Brad Allen Jedi Master Film Handler Posts: 688 From: Evansville, IN, USA Registered: May 2000 posted 02-20-2008 07:18 PM                     I have a Kelmar (sorry, not sure of part #) that was originally bought as a Infrared Reverse Scan Reader. I then purchased the visible light LED to upgrade it. What is the proper Milliampere setting for this LED? It use's the black Kelmar power supply. Thanks!  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 02-20-2008 08:27 PM                       Brad, I'll try to answer both your questions. There is no ideal current on the LED. The lower the better as long as you can get it to Dolby level or in this case Kintek level. Kintek uses the DC component the solar cell produces to simulate Dolby level so the general idea is to raise the LED current until you the cal is in range. All brands of Red readers were designed to be DC coupled to accommodate Kintek and of course they've been out of business for years. Don't overlook the importance of getting the LED to give you peak level before turning up the LED current. Run a tone loop and move the LED bracket up and down to find the loudest signal. This will get you started.  |  IP: Logged Brad Allen Jedi Master Film Handler Posts: 688 From: Evansville, IN, USA Registered: May 2000 posted 02-21-2008 03:03 PM                     Thanks Sam. I'll redo all the LED alignment again. Question, which way is the correct way for the Kelmar reader to be installed. It's not clear in the instructions. Meaning, should the wiring connections to the preamp be closest to the threading side of the sound head or not? Or does it matter? Thanks.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-21-2008 04:09 PM                     Brad, Set the cal. levels on the solor cell preamp to near maximum and then use the voltage adjust pot in the Kelmar power supply unit to lower the voltage back down to Cal level. Touch up the higher level channel to match the other channel then slightly tweek the power supply up or down again as necessary so both are at the cal. level. This will place the LED at the lowest possible operating current for your particuluar system and greatly extend the life of the LED. Mark  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-21-2008 05:13 PM                        The wiring terminal should be toward you and the open door. I don't think it will fit the other way. If it did you could simply reverse left for right; in this system it does not matter since it is a "mono with surrounds" system. (Plenty of Dolby Digital systems on E-bay.) Louis  |  IP: Logged Brad Allen Jedi Master Film Handler Posts: 688 From: Evansville, IN, USA Registered: May 2000 posted 02-21-2008 07:16 PM                     Thanks. Mark, I'll give that a whirl. Louis, fyi both of these were purchased from you several years ago. I'm pretty sure that when the lense of the reader was installed, it was attempted to install it with the wiring terminal on the door side, and the door hit it when closed, so it was turned around the other way purly for phyiscal fit reasons, since it sure is not obvious, which end is up. As far as proper A chain alignment goes, does it "matter" which way it is installed. Thanks, the help is appreciated.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-21-2008 09:07 PM                        If you rotate it, reverse the l & r so that the channels make sense. I seem to recall this has stereo surrounds with "bleed" from left & right, so it does matter. Louis  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 02-21-2008 10:23 PM                     Brad, report back with your results...I'm interested to see if you get the CAL LED to light up.  |  IP: Logged Brad Allen Jedi Master Film Handler Posts: 688 From: Evansville, IN, USA Registered: May 2000 posted 02-22-2008 05:06 PM                     Will do. Thanks everyone!  |  IP: Logged Jeremy Weigel Phenomenal Film Handler Posts: 1062 From: Edmond, OK, USA Registered: Mar 2007 posted 02-22-2008 08:35 PM                     For what its worth I was able to get CAL/BAL on our Kintek 2010's and 700 with the BACP LEDs and still had the static sound in the audio (refering to the other thread).  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-23-2008 07:05 AM                        There is a "fully loaded" CP-65 on Ebay right now. The Kintek is garbage (film done wrong.) Louis  |  IP: Logged

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