Gelombang pendek: Perbedaan antara revisi

'''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

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}}

* Sedikit ebihlebih tahan terhadap gangguan badai petir di daerah tropis.

* [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.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 }}