Update for 24-01-22 11:45
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tech/HF.wiki
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tech/HF.wiki
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= HF =
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HF or high frequency is the band with frequencies between 3mhz and 30mhz. It is
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the most prized band due to its ability to reflect off the ionosphere.
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The HF band does not have operating channels, and therefore most radios for HF
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are designed to be tuned contiuniously.
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@ -27,6 +27,7 @@ The following are the Public Use radio bands
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== Frequency Ranges ==
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see [[frequency_range]]
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see [[HF]]
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== Electronics ==
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@ -14,18 +14,18 @@ standardized. They appear below
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| Super High Freq | SHF | 3ghz - 30ghz | |
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| Extreme High Freq | EHF | 30ghz - 300ghz | |
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To calculate a wavelength from a frequency
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To calculate a wavelength from a frequency
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```
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WL = c / f
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```
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Where WL is wavelength,
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c is speed of light (3 * 10^8 m/s)
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f is frequency
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A shorthand is
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A shorthand is
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```
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WL = 300 / f
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```
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Where f is in Mhz
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== Frequency to Wavelength ==
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