Gelombang pendek: Perbedaan antara revisi

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'''Gelombang Pendekpendek''' merupakan bagian dari [[frekuensi tinggi]] dalam [[Spektrumspektrum Radio]]radio, yaitu di antara 3,000–30,000&nbsp; kHz.<ref>Tomislav Stimac, "''[http://www.vlf.it/frequency/bands.html Definition of frequency bands (VLF, ELF... etc.)] {{Webarchive|url=https://web.archive.org/web/20100430012219/http://www.vlf.it/frequency/bands.html |date=2010-04-30 }}''". IK1QFK Home Page (vlf.it).</ref> Dinamai begitu karena memiliki panjang gelombang yang relatif pendek dibanding frekuensi rendah atau menengah yang digunakan terlebih dahulu dalam komunikasi radio.
 
Awalnya dianggap tak berguna, kini [[radio]] gelombang pendek memiliki banyak aplikasi di mana sifat gelombang radio di [[atmosfer]] bumi mampu
menopang komunikasi jarak jauh. Dapat menyiarkan suara dan musik, komunikasi jarak jauh untuk kapal laut dan pesawat terbang, hingga daerah terpencil di luar jangkauan kabel atau frekuensi radio lainnya. Penggunaan radio amatir cukup populer di frekuensi ini untuk tujuan hiburan dan hobi.
 
== Sejarah ==
 
Para [[penyiar radio]] amatir memiliki peran cukup besar dalam menemukan gelombang pendek. Pada masa awal, gelombang jarak jauh disampaikan dengan [[gelombang permukaan]]. Para penyiar radio amatir [[Amerika Serikat]] pertama kali melakukan siaran trans-atlantik pada desemberDesember 1921, dan berlanjut pada beberapa percakapan pertama antara penduduk Amerika Serikat dan [[Eropa]].{{butuh rujukan}}
 
Namun, adalah [[Guglielmo Marconi]] yang melakukan penelitian lebih jauh dalammengenai gelombang pendek. Ia melakukan beberapa eksperimenpercobaan dan sukses mengirim sinyal jarak jauh menyeberangi samudera[[samudra]] dan [[benua]]. Ia kemudian mengikat kontrak dengan kantor pos kerajaan Inggris untuk teknologi telegraf kecepatan tinggi untuk menghubungkan London dan berbagai negara federasi Inggris.{{butuh rujukan}}
 
Pada tahun 1920-an, penggunaan gelombang pendek meledakmengalami peningkatan yang pesat seperti penggunaan internet di akhir abad ke-20. Komunikasi antar benua beralih dari kabel atau gelombang panjang menjadi gelombang pendek. Kejadian ini membuat bangkrut perusahaan - perusahaan kabel trans-atlantik, sehingga mereka punahtidak sekitarlagi tahunberoperasi 60sejak dekade 1960-an.{{butuh rujukan}}
 
== Penggunaan ==
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* Dapat digunakan bahkan ketika [[internet]] dan komunikasi satelit tidak ada.
* Memiliki jangkauan lebih jauh dan hemat energi dibanding gelombang lain.
* Sedikit ebihlebih tahan terhadap gangguan badai petir di daerah tropis.
 
=== Kekurangan ===
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== Pranala luar ==
* [http://www.monitoringtimes.com Monitoring Times Magazine] {{Webarchive|url=https://web.archive.org/web/20230715143135/https://www.monitoringtimes.com/ |date=2023-07-15 }} A worldwide magazine dedicated to Shortwave and Scanner listening.
* [http://www.primetimeshortwave.com www.primetimeshortwave.com] {{Webarchive|url=https://web.archive.org/web/20110320125410/http://www.primetimeshortwave.com/ |date=2011-03-20 }}
* [http://norave.ath.cx/ Global Frequency Database] {{Webarchive|url=https://web.archive.org/web/20090927010810/http://norave.ath.cx/ |date=2009-09-27 }}
* [http://www.swling.com/ SWLing.com] {{Webarchive|url=https://web.archive.org/web/20230701185255/https://swling.com/ |date=2023-07-01 }} - A beginner's guide to shortwave radio listening.
* [http://www.eibi.de.vu/ Lists of shortwave broadcasters & frequencies] {{Webarchive|url=https://web.archive.org/web/20130917114259/http://www.eibi.de.vu/ |date=2013-09-17 }}
* [http://www.naswa.net/swlguide/ Shortwave Listening Guide] {{Webarchive|url=https://web.archive.org/web/20100208232149/http://www.naswa.net/swlguide/ |date=2010-02-08 }}
* [[Glenn Hauser]]'s [http://www.angelfire.com/ok/worldofradio World of Radio] {{Webarchive|url=https://web.archive.org/web/20230225024152/https://www.angelfire.com/ok/worldofradio/ |date=2023-02-25 }} website
* [http://www.archive.org/details/ird059 The Conet project] - Recordings of Shortwave Numbers Stations [ird059] (0)
* [http://www.hfradio.org/english/ Up-to-the-minute International Broadcast Schedules in English] {{Webarchive|url=https://web.archive.org/web/20230616145740/http://hfradio.org/english/ |date=2023-06-16 }} - this is a fast, general listing that draws from HFCC database and other sources.
* [http://propagation.hfradio.org/ Space Weather and Radio Propagation Center] {{Webarchive|url=https://web.archive.org/web/20230616180459/http://www.propagation.hfradio.org/ |date=2023-06-16 }} View live and historical data and images of [[space weather]] and [[radio propagation]].
* [http://www.arrl.org/w1aw/morse.html W1AW Code Practice Files] {{Webarchive|url=https://web.archive.org/web/20100131100424/http://www.arrl.org/w1aw/morse.html |date=2010-01-31 }}
* [http://www.bdxc.org.uk The British DX Club] {{Webarchive|url=https://web.archive.org/web/20230710044606/http://www.bdxc.org.uk/ |date=2023-07-10 }}
* [http://www.chilton.com/scripts/radio/R8-receiver The Listening Post] {{Webarchive|url=https://web.archive.org/web/20190920103629/http://www.chilton.com/scripts/radio/R8-receiver |date=2019-09-20 }} An on-line shortwave radio you can tune and hear
* [http://www.30000khz.com 30,000 Kilohertz of Sound] {{Webarchive|url=https://web.archive.org/web/20230516151633/http://www.30000khz.com/ |date=2023-05-16 }} Theatrical production that incorporates shortwave broadcasts.
* [http://www.earstoourworld.org/ Ears To Our World] {{Webarchive|url=https://web.archive.org/web/20110222054106/http://earstoourworld.org/ |date=2011-02-22 }} is a shortwave radio distribution project for classrooms in the developing world.
* [http://www.economist.com/world/international/displaystory.cfm?story_id=11590746&fsrc=RSS Short-Wave Radio Hangs On For Life] {{Webarchive|url=https://web.archive.org/web/20091104023553/http://www.economist.com/world/international/displaystory.cfm?story_id=11590746&fsrc=RSS |date=2009-11-04 }} [[The Economist]] article describing pros and cons of short wave radio since the [[Cold War]].
* [http://wap.hfradio.org/ WAP/WML SWL Resources] {{Webarchive|url=https://web.archive.org/web/20080706114522/http://wap.hfradio.org/ |date=2008-07-06 }}, a searchable database of international shortwave broadcasting stations by frequency, intended for mobile devices capable of displaying [[Wireless Markup Language]] and the [[Wireless Application Protocol]]
* [http://home.earthlink.net/~haggisizing/srw-swl/swl-audio.htm Optimizing Your SWL'ing Audio Experience]{{Pranala mati|date=Maret 2021 |bot=InternetArchiveBot |fix-attempted=yes }} Tips for improving reception.
* [http://www.ac6v.com/software.htm#SA] {{Webarchive|url=https://web.archive.org/web/20230514144503/http://www.ac6v.com/software.htm#SA |date=2023-05-14 }} Software for the Yachtsman, Amateur, SWL and Shortwave Hobby in general and
* [http://mikeversteeg.com/] {{Webarchive|url=https://web.archive.org/web/20220430224610/http://mikeversteeg.com/ |date=2022-04-30 }}
{{spektrum radio}}
 
[[Kategori:Spektrum radio]]
 
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