Difference between revisions of "HF"
From The RadioReference Wiki
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| − | High frequency communications occur in the 2-30 [[MHz]] band. Signals in this band can be refracted by the ionosphere allowing worldwide propagation. The distance varies depending on time of day, the solar cycle and current solar and geomagnetic activity, but in general | + | {| width="100%" style="vertical-align:top" |
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| + | '''Welcome to the RadioReference HF Gateway. "HF" is an abbreviation for "High Frequency." See [[Spectrum]].''' | ||
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| + | High frequency communications occur in the 2-30 [[MHz]] band. Signals in this band can be refracted by the ionosphere allowing worldwide propagation. The distance varies depending on time of day, the solar cycle and current solar and geomagnetic activity, but in general it's best to listen below 10 mhz at night, above this during the day. Our [[HF Propagation]] article has links that describe these phenomenon in greater detail. | ||
Many of the FAQs linked here are courtesy of [http://www.dxing.com DXing.Com] from Universal Radio of Reynoldsburg Oh. and the Monitoring Times website. | Many of the FAQs linked here are courtesy of [http://www.dxing.com DXing.Com] from Universal Radio of Reynoldsburg Oh. and the Monitoring Times website. | ||
The RR forum for this topic can be found [http://www.radioreference.com/forums/forumdisplay.php?f=79 here] | The RR forum for this topic can be found [http://www.radioreference.com/forums/forumdisplay.php?f=79 here] | ||
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== Amateur Radio == | == Amateur Radio == | ||
| − | * [[Amateur Radio on HF]] | + | * [[Amateur Radio on HF]] |
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== Citizen's Band == | == Citizen's Band == | ||
* See the [[Citizens Band]] page for frequencies and channels | * See the [[Citizens Band]] page for frequencies and channels | ||
* [http://www.reactintl.org/ REACT] | * [http://www.reactintl.org/ REACT] | ||
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== Short Wave Broadcast == | == Short Wave Broadcast == | ||
* [[SWL Broadcast]] | * [[SWL Broadcast]] | ||
* [[Pirates and Clandestines]] | * [[Pirates and Clandestines]] | ||
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== Utility Monitoring == | == Utility Monitoring == | ||
*[[Utility Monitoring]] | *[[Utility Monitoring]] | ||
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* [[United States Coast Guard]] | * [[United States Coast Guard]] | ||
* [[USAF High Frequency Global Communications System]] | * [[USAF High Frequency Global Communications System]] | ||
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==Equipment== | ==Equipment== | ||
* For links to antennas, reviews, modifications and filters, see our [[HF Equipment and Accessories]] article | * For links to antennas, reviews, modifications and filters, see our [[HF Equipment and Accessories]] article | ||
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== Online HF Receivers == | == Online HF Receivers == | ||
There are quite a few receivers online that you can listen to HF communications. Some of them even allow you to control the radio for limited times. Some others are set to a specific frequency on the HF band that usually has a lot of activity. See the [[Live Tunable Receivers]] article | There are quite a few receivers online that you can listen to HF communications. Some of them even allow you to control the radio for limited times. Some others are set to a specific frequency on the HF band that usually has a lot of activity. See the [[Live Tunable Receivers]] article | ||
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[[Category:HF Topics]] | [[Category:HF Topics]] | ||
[[Category:RR Glossary]] | [[Category:RR Glossary]] | ||
Revision as of 20:30, 30 December 2009
Welcome to the RadioReference HF Gateway. "HF" is an abbreviation for "High Frequency." See Spectrum.
High frequency communications occur in the 2-30 MHz band. Signals in this band can be refracted by the ionosphere allowing worldwide propagation. The distance varies depending on time of day, the solar cycle and current solar and geomagnetic activity, but in general it's best to listen below 10 mhz at night, above this during the day. Our HF Propagation article has links that describe these phenomenon in greater detail.
Many of the FAQs linked here are courtesy of DXing.Com from Universal Radio of Reynoldsburg Oh. and the Monitoring Times website.
The RR forum for this topic can be found here
Amateur Radio
Citizen's Band
- See the Citizens Band page for frequencies and channels
- REACT
Short Wave Broadcast
Utility Monitoring
Utility Topics
- ALE
- COTHEN
- HF Aeronautical Communications
- HF Digital Decoding
- HF Maritime Communications
- HF Military Communications
- ICAO HF Aeronautical Stations
- ICE - Monitoring U.S. Immigration and Customs Enforcement HF Operations
- United States Coast Guard
- USAF High Frequency Global Communications System
Equipment
- For links to antennas, reviews, modifications and filters, see our HF Equipment and Accessories article
Online HF Receivers
There are quite a few receivers online that you can listen to HF communications. Some of them even allow you to control the radio for limited times. Some others are set to a specific frequency on the HF band that usually has a lot of activity. See the Live Tunable Receivers article