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In Reply to: 5 BNC superior posted by lwang on August 05, 2004 at 20:29:32:
Quite true re:RCA's but most BNC's sold today are still 50 ohms.The Canare and Cardas RCA's are pretty close to 75 ohms.
IME the quality of the connector is more important than attempting to maintain a continual 75 ohm impedance.
You are not likely to be able to see the difference between 50 ohm and 75 ohm connectors of good quality.
Follow Ups:
Here are the specs for the "Better Cables" cable I ordered (although I am too ingnorant to understand/appreciate the technical stuff):Begin Qoute:
The cable features Solid 99.999% pure Silver coated copper center conductors, hard-cell high-density foam PE insulation, 75-ohm impedance (with impedance-matched connectors), low 17.3 pF per ft capacitance, and triple shielding for unmatched RF and EMI interference protection. This cable is also NEC CL2 rated for in-wall use.
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I do know from previous computer set ups that analog video singals are subject to all kinds of problems. I had a long run (~12') from a computer to a monitor, and I had a very hard time getting a decent picture (ghosting and fuzziness). The higher the resolution, or the refresh rate, the worse the problems became. Upgrading the cable improved things noticibly, but it was still not as good as a short run. I switched to DVI and a LCD monitor, and the video quality improved greatly. I hope/expect that DVI, or some other digital cable, will be the way of the future for HT, but for now, my set up will be mostly analog.
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