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 PL-259 (male) plug. Outside diameter is about 18 mm. | |||
| Type | RF coaxial connector | ||
|---|---|---|---|
| Production history | |||
| Designed | 1930s | ||
| Manufacturer | Various | ||
| General specifications | |||
| Diameter | 18 mm (0.71 in) (typical) | ||
| Cable | Coaxial | ||
| Passband | Typically 0–100 MHz[1] | ||
| Connector |
SO-239 (socket)[2] PL-259 (plug) [3] | ||
| Electrical | |||
| Signal | Non-constant impedance[4] | ||
| Max. voltage | 500 volts peak[4] | ||
The UHF connector[4] is a name for a threaded RF connector. [5][6] The connector design was invented in the 1930s for use in the radio industry, and is a shielded form of the "banana plug".[7][8][4] It is a widely used standard connector for HF transmission lines on full-sized radio equipment, with BNC connectors predominating for smaller, hand-held equipment.[8]
The name "UHF" is a source of confusion, since the name of the connectors did not change when the frequency ranges were renamed. The design was named during an era when "UHF" meant frequencies over 30 MHz.[9][10][11] Today, Ultra high frequency (UHF) instead refers to frequencies between 300 MHz and 3 GHz[a] and the range of frequencies formerly known as UHF is now called "VHF".
Unlike modern connector designs that replaced it, no active specification or standard exists to govern the mechanical and electrical characteristics of the so-called "UHF" connector system making it effectively a deprecated design with no guarantee for suitability to an electrical or mechanical purpose.[citation needed]. Evidence of inconsistency exists.[8][1][12] Testing reveals post WWII connectors designs, such as N connector and BNC connector are electrically superior to the 'UHF' connector for modern UHF frequencies.[8][1] Other testing reveals one UHF connector sample shows negligible effect on frequencies up to 435 MHz.[12]
- ^ a b c Cite error: The named reference
HamradioMeUHFwas invoked but never defined (see the help page). - ^ US patent 2761110, Diambra, Henry M, "Solderless Coaxial Connector", published 1956-08-28, assigned to Entron Inc.
- ^ US patent 4085366, Padgett, Billy, "Noise reduction device for citizen's band transceivers", published 1978-04-18, assigned to Billy Padgett
- ^ a b c d "UHF Connector Series". Amphenol. Retrieved 23 September 2015.
- ^ US patent 2335041, Bruno, William A, "Right-angle electric connector", published 1943-11-23, assigned to Bruno Patents Inc.
- ^ US patent 2422982, Quackenbush, Edward Clarke, "Coaxial cable connector", published 1947-06-24, assigned to Quackenbush, Edward Clarke
- ^ Henney, Keith (1941). "15". Radio Engineering Handbook (PDF) (Third ed.). New York, NY: McGraw-Hill Book Company. p. 514. Retrieved 12 September 2018.
- ^ a b c d Hallas, Joel R. (5 October 2012). Care and Feeding of Transmission Lines. Newington, CT: American Radio Relay League. ISBN 978-0872594784.
- ^ Pollack, Dale (1941). "High-Frequency Transmission and Reception". In Henney, Keith (ed.). Radio Engineering Handbook (3rd ed.). New York; London: McGraw-Hill Book Company. p. 514.
- ^ "(PL) 259 Connectors". Connectors. Hamradio.me. July 2011. Retrieved 16 May 2015.
- ^ "Introduction to U.H.F.". The Radio Amateur's Handbook (18th ed.). West Hartford, CT: American Radio Relay League. 1941. pp. 362–363.
In Amateur work, the ultra-high-frequency region is considered to include the 56 to 60 MC band and all higher frequency bands available for amateur use.
- ^ a b "PL-259 vs. N on 430 MHz". IZ2UUF Radio Amateur Technical Blog. Retrieved 25 May 2020.
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
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