Video Cables

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KnightTerror

Member - Posts: 2

Joined: February 11, 2004

Location: United States

Posted: February 11, 2004 at 7:28 PM / IP Logged

Ok I hope this isnt a duplicate of any previous posts but I couldn't find any that could answer my questions about running video cables.

Ok, I am installing a new headrest LCD unit in my car. Also, when I was looking around for video cables (I purchased the LCD by itself) I noticed that all the cables have a 75 Ohm resistance. And finally, I notice that some of the cables are cheaper than others. So here are my questions:

1) What all should I avoid when running my video cables besides running them away from power?

2) Why are cables 75 Ohm? Is there a better resistance to have, or is this resistance somehow important to video?

3) Finally, what would the result be if I used cheap video cables as opposed to more expensive ones?

Any help on these questions would be greatly appreciated. Thanks!

-Knight

MielGibson

Copper - Posts: 74

Joined: January 03, 2003

Location: United States

Posted: February 16, 2004 at 9:33 PM / IP Logged

75 ohms has more to do with impedance than with resistance. Impedance is a reaction to an AC signal. All you need to know, in this case, is that the closer to 75 ohms, the better.

An excellent way to make high quality cables is to use RG-59 coaxial cable, the one they use for CATV, and good quality RCA connectors. If you can find rg-59 with RCA connectors, go for it.

If you don't want to bother soldering or crimping RCA connectors, buy the rg-59 with the standard F connectors, then use F to RCA adapters.

RG-6 cable, used in satellite setups, is even better, the downside is that it's less flexible than rg-59.

You can use the same technique to build audio cables.

You will have excellent cables that will give those outrageously-priced products a

run for their money.

Good Luck!

videoviking

Member - Posts: 15

Joined: February 16, 2004

Location: United States

Posted: February 16, 2004 at 10:26 PM / IP Logged

to further add to the last reply, we have a saying in the video industry that you pay for the quality that you get. As stated above, use the RG-59 if you can, but look for one with a full shield versus a wrap. Also, it would be well worth the extra few cents to buy the most flexible cable that you can get for the runs down the seat and under the carpeting.

Check Markertek Supply http://markertek.com/ they are the braodcast house that we use and you can find good deals on cable and connectors.

Chuck Johnston

KnightTerror

Member - Posts: 2

Joined: February 11, 2004

Location: United States

Posted: February 17, 2004 at 11:12 AM / IP Logged

Thanks for your help guys (and gals?). I didn't even think about making my own. That is a good money saving tip.

Thanks again!

-Knight

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Video Cables

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