""""" RCA """""

RCA >> Radio Corporation of America, was an electronics company in existence from 1919 to 1986.

During the first years the company owned parts of the British His Master's Voice (now part of EMI) and the German Deutsche Grammophon Gesellschaft (now part of Universal). Since 2004, RCA is now the backbone of the RCA Music Group, a unit of Sony BMG, which includes J Records, RCA and Arista.

An RCA connector, sometimes called cinch plug or lotus plug, is a type of electrical connector that is commonly used in the audio or video market. For many other applications it began to replace the older hack plugs used in the audio world when component high fidelity started becoming popular in the 1950s.

In the most normal usage, cables have a standard plug on each end, consisting of a central male connector, surrounded by a ring. The ring is often segmented for flexibility. Devices mount the jack, consisting of a central hole with a ring of metal around it. The ring is slightly smaller in diameter and longer than the ring on the plug, allowing the plug's ring to fit tightly over it. The jack has a small area between the outer and inner rings which is filled with an insulator, typically plastic (very early versions, or those made for use as RF connectors used ceramic).

As with many other connectors, the RCA has been adopted for other uses than originally intended, including as a power connector, an RF connector, and as a connector for loudspeaker impedance matching. RCA connectors and cable are also commonly used to carry S/PDIF-formatted digital audio, with plugs colored orange to differentiate them from other typical connections. cables. Its use as a connector for composite video signals is extremely common, but provides poor

Connections are made by pushing the cable's plug into the female jack on the device. The signal-carrying pin protrudes from the plug, and often comes into contact with the socket before the grounded rings meet, resulting in loud hum or buzz if the audio components are powered while making connections. Continuous noise can occur if the plug partially falls out of the jack, breaking ground connection but not the signal. Some variants of the plug, especially cheaper versions, also give very poor grip and contact between the ground sheaths due to their lack of flexibility.

They are often color-coded, yellow for composite video, red for the right channel, and white or black for the left channel of stereo audio. This trio (or pair) of jacks can be found on the back of almost all audio and video equipment. At least one set is usually found on the front panel of modern TV sets, to facilitate connection of camcorders (through 3.5mm Jack to 3 RCA, also called Mini RCA plug), digital cameras, and video gaming consoles. Although nearly all audio-visual connectors, including audio, composite and component video, and S/PDIF audio can use identical 75 Ω cables, sales of special-purpose cables for each use have proliferated. Varying cable quality means that a cheap line-level audio cable might not successfully transfer component video or digital audio signals due to impedance mismatch and poor shielding quality (causing signal-to-noise ratio to be too low). Cables should meet the S/PDIF specification as defined by the international standard IEC 60958-3 for assured performance.

The male plug has a center pin which is 3.70 mm in diameter, and is surrounded by an outer shell which is 8.25 mm in diameter.

Plugs and sockets on consumer equipment are conventionally color-coded to aid correct connections. The standard colors for the various signals are shown below.

In stereo audio applications there are combination of either Black+Red or White+Red RCA connectors; in both cases, Red denotes Right. White or Purple may also be replaced by Black.

While these are the standard colours found on commercially made products, same-coloured cables may also be used. For example, a red cable may be used instead of a yellow one, as there is no other significant difference between them.

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