Talk:RCA connector
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[edit] What does "RCA" stand for?
what does RCA stand for? —The preceding unsigned comment was added by 67.168.230.116 (talk • contribs).
- It stands for Radio Corporation of America. --Abdull 14:25, 22 May 2005 (UTC)
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- someone took out the reference to RCA in the article, so I put it in a bit differently, BUT I don't know where to find a refernce to it! I will look in a few books in the next few days, but it has just sort of "been there" all my life..
- I do have at least a few "5 Tube" radios with the connector on the back, linked with a capacitor to the grid of the 12SQ7, actually unlabeled on the radio. I recall reding somewhere that some makers even marked the Jack "televison" in the 30s figuring that TV sets would not duplicate the Powerful audio section and 12 inch speaker of a typical console radio.cmacd 13:24, 28 March 2007 (UTC)
[edit] Standards for audio signals?
Today, RCA jacks and jack plugs are mostly found on audio/video consumer products. Does anyone know the standards for the audio signals it carries (i.e. lowest and highest voltage, dynamic range handling etc.)? - unfortunately i can't find any articles on the internet regarding analogue audio standards. Thanks, --Abdull 14:25, 22 May 2005 (UTC)
- Audio signals on "RCA cables" are usually "line level" signals at about 1V (~0dbm) RMS or so. The source impedance is usually low (less than 1 Kohm or so) and the load impedance is usually high (100 Kohms or more).
- "Magnetic phono" levels were also seen back in the days of vinyl records. These are usually about a millivolt or so at quite low impedance.
- Digital data is also seen (on the connecton between DVD players and home theater multichannel decoders. These are TTL logic levels at a modest impedance.
- Video (both composite and component) also travels on RCA cables; this is usually 1 V P-P at 75 ohms.
- Generally, for short distances, any RCA cable can be pursuaded to carry any signal fairly well.
- Atlant 13:32, 15 June 2006 (UTC)
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- Could it be made a little more obvious that the cable type is the same regardless of whether the composite video or audio signal is sent through it (other that the sleeve colour)? That's what I came here to find out anyway, and didn't get a definate answer, even though I guess it's obvious. Oh, and I've got a few different RCA cables at the moment so I'll try take a better photo for the article. --Pepsi max2k 07:33, 19 June 2006 (UTC)
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- The cable isn't necessarily the same, especially for 75 ohm video. And it's not uncommon to see, in stereo+video cables, the video portion of the cable made of different cable than the two audio conductors.
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- Atlant 21:54, 12 December 2006 (UTC)
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[edit] Better pictures?
- Hi, just wondering if anyone could possibly find some better quality pictures to use on this article - the ones there at the moment seem a bit substandard. 144.173.6.77 11:22, 2 Jun 2005 (UTC)
[edit] Maximum length?
Anyone know the maximum length for one of these things?!! I have been looking for days....... —The preceding unsigned comment was added by 63.69.63.29 (talk • contribs).
- The maximum length for an RCA cable is limited by the cable capacitance, the source impedance, and the amount of induced noise. 12 feet is a common upper boundary for pre-made cables but I've built my own cables in the 20-some foot length.
- Atlant 13:32, 15 June 2006 (UTC)
[edit] How many signals?
It says here that RCA's need two cable to carry one signal. This is, at least in my experiance, untrue. An RCA can handle one signal and one channel so you would need two RCA's for two channels (Right and Left) to get stereo sound . I have never seen an (audio) appliance connected to an amplifier with more than two RCA's. I don't belive that the "four cables" example is accurate. —The preceding unsigned comment was added by Reallybadtrip (talk • contribs).
- One signal per connector (wire) unless it's digitally-encoded data. So you commonly see 1 conductor RCA cables, two-conductor stereo cables (Red+White), three-conductor stereo+video cables (Red+White+Yellow) or component video cables (Red+Blue+Green), and four conductor stereo "to/"from" cables.
- Atlant 13:32, 15 June 2006 (UTC)
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- The article makes the mention of the four cables in the context of Bi-directional stereo connections, maybe a sentence or two requires clarification? — Mobius 10:04, 19 June 2006 (UTC)
[edit] Wrong link?
The link to the article "ST" at the end links to a disambig that doesn't link to the intended article. I'm removing the link for now 192.136.22.4 19:30, 16 October 2005 (UTC)
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- Here's a site that has more details & specs on the RCA phono connectors thaty may answers some of your questions about standards. It was the only site that answered mine about what was signal & what was ground. Something that SHOULD have been on this site & most of the others I checked. http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci786116,00.html —The preceding unsigned comment was added by 69.107.98.12 (talk • contribs).
[edit] Better Photo
The current photo of RCA jacks and plugs is very out of focus and has low contrast. Could it please be replaced with a better image? —The preceding unsigned comment was added by Navstar (talk • contribs).
- Ask the uploader. And please sign your comments! huntersquid 19:57, 27 June 2006 (UTC)
[edit] RYW vs RGB
is possible to use an RBG(M) cable in an RYW(F)? --61.68.27.183 15:47, 7 January 2007 (UTC)
[edit] Balanced vs. Unbalanced
While balanced/unbalanced audio signals should (and do) have their own wiki articles, this article should include a reference to the fact that using RCA connectors for audio implies that the connection will be unbalanced.
Snottywong 18:56, 27 March 2007 (UTC)
