Differences in RCA-Connector-Terminated Coaxial Cables - AVS Forum
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post #1 of 5 Old 03-07-2011, 01:08 PM - Thread Starter
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I have been examining coaxial cables that terminate with RCA connectors.

Vendors of such cables often specify the use for the cable.

The uses are often for transport of audio, "digital audio", component video, composite video, digital coax, etc.

Some examples from Monoprice.com:
1.5ft Triple RCA Stereo Video Dubbing Composite Cable (3 x RG59U)
http://www.monoprice.com/products/pr...t=1#largeimage

1.5ft 22AWG 3-RCA Component Video Coaxial Cable (RG-59/U) - Black
http://www.monoprice.com/products/pr...t=1#largeimage

1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black
http://www.monoprice.com/products/pr...t=1#largeimage

3ft High-quality Coaxial Audio/Video RCA CL2 Rated Cable M/M RG6U 75ohm Gold connector (for S/PDIF, Digital Coax, Subwoofer & Composite Video)
http://www.monoprice.com/products/pr...t=1#largeimage Are the RCA-connector terminated coaxial cables of the same design, varying only cosmetically (such as different color connectors or connectors of different fanciness)?

Wherefore, would any of the following be false:

a "composite video" (often yellow connector) cable may be used to carry audio signal
a coaxial audio cable may be used for transport of composite video.
a set of composite cables (usually with yellow, white, and red connectors) may be used in place of a set of component cables (usually having red, green, and blue connectors).
a set of component cables (usually having red, green, and blue connectors) may be used in place of a set of composite cables (usually with yellow, white, and red connectors).
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post #2 of 5 Old 03-07-2011, 01:31 PM
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In short Yes... All of the cables you linked to would be able to serve as an Audio or Video cable and either Analog or Digital (which is still technically analog)

If your into DIY personally I use coax for pretty much all my mono cables and use compression connectors for RCA or F-Pin so i can get the exact length i need

If you want to learn a little more this article is very insightful.
[noturl]http://www.bluejeanscable.com/articles/signalconnector.htm[/noturl]

Tommy: What's wrong with this one?
Turkish: Oh, nothing, Tommy. It's tiptop. It's just I'm not sure about the color.

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post #3 of 5 Old 03-07-2011, 02:07 PM
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Quote:
Originally Posted by Ascii2 View Post

Wherefore, would any of the following be false:

...a coaxial audio cable may be used for transport of composite video.

Not necessarily true.
Quote:


a set of composite cables (usually with yellow, white, and red connectors) may be used in place of a set of component cables (usually having red, green, and blue connectors).

Not necessarily true.

Any coax will work for analog audio as long as the capacitance is low enough. However, video and digital audio inputs/outputs are designed for a cable with a 75 ohm characteristic impedance, like RG-59. If the cables are very short, it won't make a difference if something else is used. But if the cables are more than a fraction of a wavelength long, performance will suffer if 75 ohm cables are not used. For analog video, you will see subtle to not so subtle changes in the picture. For digital audio you may not notice a difference until the sound is unusable.
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post #4 of 5 Old 03-08-2011, 11:59 AM - Thread Starter
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Thank you for the assistance.

I now believe that I fully understand.
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post #5 of 5 Old 03-08-2011, 12:00 PM - Thread Starter
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With this post, the URLs from the initial post should be usable as links.
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