01-03-2016  (701 lectures) Categoria: Articles

Jack mini

Modern connectors[edit source | edit]

Phone connectors:
  • 2.5¬†mm mono (TS)
  • 3.5¬†mm mono (TS)
  • 3.5¬†mm stereo (TRS)
  • 6.35¬†mm (1‚ĀĄ4 in) (TRS)

Modern phone connectors are available in three standard sizes. The original¬†1‚ĀĄ4 in (6.35¬†mm) version dates from 1878, when it was used for¬†manual telephone exchanges, making it possibly the oldest electrical connector standard still in use.

The 3.5 mm or miniature and 2.5 mm or sub-miniature sizes were originally designed as two-conductor connectors for earpieces on transistor radios. The 3.5 mm connector, which is the most commonly used in portable application today, has been around at least since the Sony EFM-117J radio which was released in 1964.[6][7] It became very popular with its application on the Walkman in 1979.

The 3.5¬†mm and 2.5¬†mm sizes are also referred to as¬†1‚ĀĄ8 in and¬†3‚ĀĄ32 in respectively in the United States, though those dimensions are only approximations. All three sizes are now readily available in two-conductor (unbalanced mono) and three-conductor (balanced mono or unbalanced¬†stereo) versions.

Four- and five-conductor versions of the 3.5 mm plug are used for certain applications. A four-conductor version is often used in compact camcorders and portable media players, and sometimes also in laptop computers and smartphones, providing stereo sound plus a video signal. Proprietary interfaces using both four- and five-conductor versions exist, where the extra conductors are used to supply power for accessories. The four-conductor 3.5 mm plug is also used as a speaker-microphone connector on handheld amateur radio transceivers from Yaesu[8] and on some mobile phones.

The most common arrangement remains to have the male plug on the cable and the female socket mounted in a piece of equipment: the original intention of the design. A considerable variety of line plugs and panel sockets is available, including plugs suiting various cable sizes, right-angle plugs, and both plugs and sockets in a variety of price ranges and with current capacities up to 15¬†amperes for certain heavy duty¬†1‚ĀĄ4 in versions intended forloudspeaker connections.[9]




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