Difference between revisions of "HF"
From The RadioReference Wiki
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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] | ||
| − | + | "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 the higher frequencies go further in daylight and the lower frequncies go further at night. | |
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| − | + | 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. | |
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| − | + | The RR forum for this topic can be found [http://www.radioreference.com/forums/forumdisplay.php?f=79 here] | |
| − | + | == Amateur Radio == | |
| − | + | * [[Amateur Radio on HF]] | |
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| − | == Amateur | ||
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| − | * | ||
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== Citizen's Band == | == Citizen's Band == | ||
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* [http://www.reactintl.org/ REACT] | * [http://www.reactintl.org/ REACT] | ||
| − | == Short Wave Broadcast == | + | == Short Wave Broadcast == |
| − | + | * [[SWL Broadcast]] | |
| − | * | + | * [[Pirates and Clandestines]] |
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== Utility Monitoring == | == Utility Monitoring == | ||
| − | The best way to describe Utility (Ute) monitoring is to use negative logic; it excludes | + | The best way to describe Utility (Ute) monitoring is to use negative logic; it excludes CB, Amateur and Short Wave Broadcast. This includes, but is not limited to, aeronautical stations, digital signals (outside of the specified amateur bands), military, maritime, federal and other users. See our [[Utility Monitoring]] page for more information and links. |
| − | == | + | === Utility Topics === |
| − | + | * [[ALE]] | |
| − | + | * [[COTHEN]] | |
| − | == | + | * [[HF Aeronautical Communications]] |
| − | [ | + | * [[HF Digital Decoding]] |
| + | * [[HF Maritime Communications]] | ||
| + | * [[HF Military Communications]] | ||
| + | * [[ICE]] - Monitoring U.S. Immigration and Customs Enforcement HF Operations | ||
| + | * [[USAF High Frequency Global Communications System]] | ||
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| + | ==Equipment== | ||
| + | ===HF Capable Receivers=== | ||
| + | * These are manufacturers of receivers and other equipment that can be used to listen on HF; | ||
| + | ** [[AOR Radios]] | ||
| + | ** [[Icom Radios]] | ||
| + | ** [[Alinco Radios]] | ||
| + | ** [[Yaesu Radios]] | ||
| + | ** [[Yupiteru Radios]] | ||
| + | * The [[:Category:Receiver Reviews|Receiver Reviews]] category has numerous links on receiver reviews, many of which are online | ||
| + | ===Antennas and Filters=== | ||
| + | * No matter how good the radio, without an antenna, it won't hear very much. Here's a few places to get some links and information on the subject | ||
| + | ** [[HF Antennas]] | ||
| + | ** [[Active Antennas KB6RWX]] | ||
| + | ** [[Loops]] Some are broadbanded enough to reach the HF spectrum | ||
| + | ** [[The McGyver(tm) special]] | ||
| + | * In urban areas, it's sometimes necessary to add some front end filtering to eliminate reception (or at least reduce it) of MW signals. These signals can cause multiple false signals (often heard as distorted spurs) to appear throughout parts, or all, of the HF spectrum. | ||
| + | ** [http://www.iceradioproducts.com/filtersrf.html#bcb ICE BCB Filters] | ||
| + | ** [http://www.kiwa.com/bcb.html Kiwa Broadcast Band Rejection Filter] | ||
| + | ** [http://www.kiwa.com/bcblw.html Kiwa Broadcast Band filter for longwires] | ||
| + | ** [http://www.parelectronics.com/swl_filters.htm PAR BCST-HPF Filter] | ||
| + | *** [http://www.monitoringtimes.com/html/mt2001reviews.html#PAR%20AM%20Broadcast%20Filter PAR AM Broadcast Filter review from MT] | ||
| + | ** [http://www.scannermaster.com/SearchResults.asp?Cat=39 Scanner Master Filters page] | ||
| + | ** [http://www.stridsberg.com/prod02.htm Stridsberg Engineering Filters] | ||
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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. | 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. | ||
[[Live Tunable Receivers]] | [[Live Tunable Receivers]] | ||
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[[Category:HF Topics]] | [[Category:HF Topics]] | ||
[[Category:RR Glossary]] | [[Category:RR Glossary]] | ||
Revision as of 16:17, 28 November 2009
"HF" is an abbreviation for "High Frequency." See Spectrum.
High frequency communications occur in the 3-30 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 the higher frequencies go further in daylight and the lower frequncies go further at night.
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
"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 the higher frequencies go further in daylight and the lower frequncies go further at night.
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
Contents
Amateur Radio
Citizen's Band
- See the Citizens Band page for frequencies and channels
- REACT
Short Wave Broadcast
Utility Monitoring
The best way to describe Utility (Ute) monitoring is to use negative logic; it excludes CB, Amateur and Short Wave Broadcast. This includes, but is not limited to, aeronautical stations, digital signals (outside of the specified amateur bands), military, maritime, federal and other users. See our Utility Monitoring page for more information and links.
Utility Topics
- ALE
- COTHEN
- HF Aeronautical Communications
- HF Digital Decoding
- HF Maritime Communications
- HF Military Communications
- ICE - Monitoring U.S. Immigration and Customs Enforcement HF Operations
- USAF High Frequency Global Communications System
Equipment
HF Capable Receivers
- These are manufacturers of receivers and other equipment that can be used to listen on HF;
- The Receiver Reviews category has numerous links on receiver reviews, many of which are online
Antennas and Filters
- No matter how good the radio, without an antenna, it won't hear very much. Here's a few places to get some links and information on the subject
- HF Antennas
- Active Antennas KB6RWX
- Loops Some are broadbanded enough to reach the HF spectrum
- The McGyver(tm) special
- In urban areas, it's sometimes necessary to add some front end filtering to eliminate reception (or at least reduce it) of MW signals. These signals can cause multiple false signals (often heard as distorted spurs) to appear throughout parts, or all, of the HF spectrum.
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.