UHF connector

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PL-259 (male) plug. Outside diameter is about 18
mm.

The UHF connector, also called the Amphenol coaxial connector, is
a World
War II threaded RF connector design, from
an era when UHF referred to
frequencies over 30 MHz. Originally intended for
use as a video
connector in RADAR applications, it was later
used for RF applications.

UHF connectors are generally usable through what is now known as the VHF and HF frequencies
and can handle RF power levels over one kilowatt. Despite the name it
is rarely used for actual UHF frequencies as they don't work well above 300
MHz.

The most popular cable plug and chassis-mount socket carry the old Signal
Corps nomenclatures PL-259 and SO-239, respectively. The
PL-259 can be used with large diameter coaxial cable, such as
RG-8/U and RG-9/U, and the smaller diameter RG-58/U and RG-59/U with the
UG-175/U and UG-176/U adapter sleeves. Technically, "PL-259" refers to one
specific mechanical design, but the term is often used for any UHF cable plug.
The thread is usually 5/8 inch 24tpi UNEF standard, however, UHF connectors with
a similar, metric, thread have been produced[1].
The center conductor jack on the SO-239 will also accept a banana
plug.

UHF connectors were replaced in many applications by designs that have a more
uniform impedance over the
length of the connector, such as the N connector and the BNC
connector, but they are still widely used in amateur radio, citizens' band
radio, and marine VHF radio.

UHF connectors were also used for the input & output of composite video signals
for older video equipment (such as VTRs & monitors) dating from
the late 1970s and earlier. They were known by BBC engineers as 'F & E'
connectors, after Films & Equipment, a manufacturer.

[edit]
See also

Miniature UHF
connector

[edit]
References

^ IC-20 Instruction Manual, pp. 4, http://www.icom.co.jp/manual/external/transceivers/IC-20.pdf, retrieved on 20 September 2007

[edit]
External links

UHF connector overview

v • d • e

RF
connectors

N · BNC · TNC · F · SMA · SMB · SMC · TV Aerial
Plug · MMCX · MCX · FME · C · UHF · GR · Motorola · Musa · Mini-UHF · QMA/QN · APC-7 · EIA · Hirose
U.FL

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This page was last modified on 12 November 2008, at 12:16.

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