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Author Topic: Wiring a cell for beginners. Alan Gouger Jedi Master Film Handler Posts: 501 From: Bradenton, FL, USA Registered: Jul 2000 posted 06-05-2006 07:19 PM                        Im wiring my very first stereo cell and want to make sure I get this correct. I have three wires coming off the cell into the connecting block. Grn,Blk,Red. From the research Ive done green is left and red is right. Blk is ground. The wire Im using has an additional shield wire running through the jacket. This is where I need help. Do I connect that at one end and float it at the other and if so what end. Does anything go to projector ground. I definitely want to eliminate the possibility of any interference. Thanks for putting up with the newbie question  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 06-05-2006 08:00 PM                    This is the way it is. Red is left Black wires are tied together to the common and green is right. Connect the shield at the preamp ground E connection only.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 06-05-2006 09:44 PM                     Navy style red=port (left) green= starboard (right)  |  IP: Logged Frank Dubrois Jedi Master Film Handler Posts: 896 From: Cleveland, OH Registered: Mar 2005 posted 06-05-2006 10:25 PM                    Port and starboard? Ok, that oughta help him...  |  IP: Logged Alan Gouger Jedi Master Film Handler Posts: 501 From: Bradenton, FL, USA Registered: Jul 2000 posted 06-06-2006 09:01 AM                        Thank you.  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 06-06-2006 09:37 AM                        And Alan, make sure you use high quality Belden or equiv audio cable suitable for microphone signals. The signal coming out of that cell is mic level and thus gets substantial amplification at the processor. Although the signal is balanced, you want a cable that has good shielding. A good mic cable will ward off pesky noise problems.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 06-06-2006 10:20 AM                       One of the best practical cables for this purpose is Belden 8723. It has two pairs, red/black and green/white with one overall shield. It make mistaking the left and right signals almost impossible, and is very imporant to have two balanced pairs if you are using a red reader with balanced outputs.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 06-06-2006 11:09 AM                        Amen to Sam! That is very best possible cable! Louis  |  IP: Logged Alan Gouger Jedi Master Film Handler Posts: 501 From: Bradenton, FL, USA Registered: Jul 2000 posted 06-06-2006 11:34 AM                        Frank and Sam thanks for the advice. The cable Im using is indeed two pairs, red/black and green/white with one overall shield but it is not Belden. Question: Im up and running and notice every once in a while I will get a loud crack or static type noise. Is static a normal concern with analog tracks? My booth is in the basement with carpet, no humidifier as of yet but I plan on adding one very soon. Its needed. Wiring and electronics are clean so Im confident they are not the culprit. Im thinking of adding a film cleaner machine with some Film Guard. That should help with static cling. [ 06-06-2006, 05:16 PM: Message edited by: Alan Gouger ]  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 06-07-2006 10:54 AM                     The Belden 8723 was mis-described above. It is not an OVERALL shield cable but an individually shielded cable with a common drain. An overall shield would have all four conductors co mingling without the benefit of a twisted pair for noise immunity from within (or crosstalk). 8723 acts like two individual runs but with only one shield to terminate. It is truely a great cable...accept no substitutes!  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 06-07-2006 03:46 PM                        The click you describe is sometimes caused by static electricity. When I tell you to add a ground wire, I am not talking about changing any of your existing wiring. Ground the frame of the cell solidly to the frame of the projector. If you have a Simplex or RCA, it is possible that the floating chassis is not still grounded until you do this. Louis  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 06-07-2006 03:56 PM                     I believe it's called the "Special Purpose Audio" cable. And, yes, port and starboard...that's actually where that code comes from, so they're not being cheeky.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 06-07-2006 06:25 PM                       Steve, It's not your turn to be pedantic, but you are correct. I believe the color scheme came from Ioan Allen who spent some time in the Royal Navy  |  IP: Logged Phil Hill I love my cootie bug Posts: 7595 From: Hollywood, CA USA Registered: Mar 2000 posted 06-07-2006 06:48 PM                  Easy ways to remember which is which... "I wonder if there's any red port wine left" Or for the goodie-2-shoes: "Port is a red wine and wine is not right" (That's the one I think of...)  |  IP: Logged Marc Hansen Film Handler Posts: 93 From: Seattle, WA, USA Registered: Dec 2000 posted 06-07-2006 08:30 PM                     And for those who don't know wine at all just remember that all the short words (port,red,left) go together and all the long words (starboard,green,right) go together.  |  IP: Logged

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