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Gear / Technical Help => Cables => Topic started by: spott on November 07, 2006, 11:29:52 PM
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Also check the video out for making an open source TiVo (MythTV)
http://revision3.com/systm/avcabling (http://revision3.com/systm/avcabling)
In this episode we teach you how to make the same cables that most broadcast engineers use for their own projects and talk about why they don't buy those expensive cables at the stores. We show you the tools and how to use them so that you can become the cable making professional you were meant to be. Finally, we show you how to organize the rat's nest behind the TV for that professional look and a broadcast quality signal.
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nice find! +T steve....
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Great vid...thanks
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thanks for the vid
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Cool. Looks interesting. Thanks +T
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I also found this video on how to make some interconnect cables. http://guerrillaaudio.com/store/bunker/How_to_build_your_own_high_end_Interconnect_Cables.html
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If anyone is interested I have the original systm video of them making cables from the link in the first post. I believe its around 500mb and large enough to see what they're doing.
If you'd like it send me a PM and I'll figure out a way to get to anyone that wants it.
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The guy is talking about pinching the center conductor of an RCA conductor to make it out of round and increase the contact pressure! WTF? How about just getting a good RCA connector to begin with? Boogering up your connector's center pin with needlenose pliers does not sound like good advice to me. What is it about people who make cables for a living that makes them so prone to spread this type of poor advice?
The guy also talks about the shielding being 75 ohms. There's nothing about the shielding that makes it 75 ohm shielding. 75 ohms is the intrinsic impedance of the cable, not just the shield. The cable impedance is set by the dielectric constant of the insulating material between the center conductor and the outer conductor and by the ratio of the inner diameter of the outer conductor to the outer diameter of the inner conductor.
I couldn't get past the first 10 minutes because I kept hearing misinformation. Maybe I'm too hard on the guy, but it's hard for me to take advice from someone who so obviously doesn't understand the details of the technology they are using. On the other hand, I suppose he can make good cables without knowing anything about transmission line theory, shielding or material properties.
Oh, and by the way, gold is NOT the best conductor in terms of conductivity. It just happens to be a conductor that is not particularly prone to corrosion.