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Author
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Topic: Source for a DB25 to 6 RCA cable?
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Steve Guttag
We forgot the crackers Gromit!!!
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Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 12-30-2017 08:01 AM
We also make them (use Belden snake cable, AMP DB connectors with diecast shells and gold RCAs).
As for tying the shields in a 2-cond/shield wire, thre are two schools of thought here. You can just tie them at the JSD60 end and insulate them back at the Oppo end. This will let any noise drain at the JSD60, which will help keep a central point for ground. The Oppo's output is unbalanced but I believe iits chassis is grounded via the power cord (most consumer electronics have no real ground since they are only 2-prong devices but the Oppo has a 3-prong power cord). So, if the RCA connectors are tied to chassis, then I'd tie the shields, if they float off of ground, I'd fload the shields and let the JSD60 be THE ground reference for the shields. The differential input of the JSD60 only really cares about the potential difference on the two wires connected to them and will have a high CMRR. Tying the shield at the Oppo end is a matter of trying not to create a ground loop. The longer the cable, the bigger a deal this becomes.
I talked to Mark (Odyssey) at CinemaCon about making a breakout board. The idea was a DB25 to RCA (where there would be RCA connectors on the breakout board). Then one could run 3 or 4 stereo RCA cables (5.1/7.1). I don't know if he ever made it though. Since we make our own cables, the cost overhead of breakout boards typically exceeds our cost of the materials and then we can make the cable to any desired length (or even terminate on-site if we are running it through conduit since sometimes the Blu-ray player lives in the pedestal and we need to get the audio to the soundrack..
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