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| vhf_uhf_beginners [2025/03/21 23:58] – created m7tox | vhf_uhf_beginners [2025/03/28 07:32] (current) – Link the classification of radio waves 2e0itb |
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| ===== What is VHF/UHF ===== | ===== What is VHF/UHF ===== |
| Like many things in life, particularly technical fields like amateur radio, VHF/UHF are somewhat confusingly named. The 'F' stands for frequency, which measures how many times the radio wave //oscillates// (think of it as how many times the wave moves up and down) per second, which is measured in Hertz (Hz). We ((I don't know who 'we' is, probably the [[https://en.wikipedia.org/wiki/International_Telecommunication_Union|ITU]])) have decided on a convention on what is classed as 'low frequency', and 'high frequency', except they're all rather high when you consider how many thousands hertz the 'low' frequencies are. It's all about perspective, I guess. | Like many things in life, particularly technical fields like amateur radio, VHF/UHF are somewhat confusingly named. The 'F' stands for frequency, which measures how many times the radio wave //oscillates// (think of it as how many times the wave moves up and down) per second, which is measured in Hertz (Hz). We (([[classification_of_radio_waves|Classification of Radio Waves]])) have decided on a convention on what is classed as 'low frequency', and 'high frequency', except they're all rather high when you consider how many thousands hertz the 'low' frequencies are. It's all about perspective, I guess. |
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| Here are the VHF and UHF amateur allocations in the UK. We call them 'bands' and often use their wavelength in metres to talk about them instead of their frequency: | Here are the VHF and UHF amateur allocations in the UK. We call them 'bands' and often use their wavelength in metres to talk about them instead of their frequency: |
