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Update for 24-01-22 11:45

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Tyler Perkins 2022-01-24 11:45:01 -05:00
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= HF =
HF or high frequency is the band with frequencies between 3mhz and 30mhz. It is
the most prized band due to its ability to reflect off the ionosphere.
The HF band does not have operating channels, and therefore most radios for HF
are designed to be tuned contiuniously.

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== Frequency Ranges == == Frequency Ranges ==
see [[frequency_range]] see [[frequency_range]]
see [[HF]]
== Electronics == == Electronics ==

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| Extreme High Freq | EHF | 30ghz - 300ghz | | | Extreme High Freq | EHF | 30ghz - 300ghz | |
To calculate a wavelength from a frequency To calculate a wavelength from a frequency
```
WL = c / f WL = c / f
```
Where WL is wavelength, Where WL is wavelength,
c is speed of light (3 * 10^8 m/s) c is speed of light (3 * 10^8 m/s)
f is frequency f is frequency
A shorthand is A shorthand is
```
WL = 300 / f WL = 300 / f
```
Where f is in Mhz Where f is in Mhz
== Frequency to Wavelength == == Frequency to Wavelength ==