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Tags

A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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in the United States an unlicensed radio service operating on 27 MHz.
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for questions relating specifically to the amateur radio UHF allocation around 430 MHz.
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Questions about the phone modes, most commonly SSB on HF and FM on VHF/UHF, but also including DSB-SC, PM, or AM.
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For questions specific to the FT8 mode
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Low power operation, Typically 5 watts or less
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Questions specific to rules, regulations, and practices in European countries.
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Questions specific to rules, regulations, and practices in Canada.
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Questions related to writing software (programming) for Amateur Radio purposes.
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Questions about the surface of the Earth as it affects radio propagation and antenna system design and installation. For questions about RF grounds and shields, counterpoises, virtual grounds, etc. us…
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Satellite navigation systems, including GPS. Questions should be related either to amateur radio operations (e.g. APRS tracking) or the theory of positioning using radio signals; questions merely abou…
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for questions relevant to vacuum tubes, also known as thermionic valves or simply valves.
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an emergency preparedness/ contest run by ARRL in the United States and Canada the last full weekend of June each year.
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Questions about low-noise amplifiers (LNAs) and their application in receiving antenna systems.
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for questions relating to Slow-Scan Television (SSTV) operations.
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for questions that relate to the efficiency of a system or a component. The efficiency is the amount of useful work performed by the system or component (in radio applications, typically …
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Signal to Noise Ratio - any questions about improving or detecting an SNR or lowering your noise floor.
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American Radio Relay League (ARRL), the largest association of amateur radio enthusiasts in the USA
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Questions regarding the modification of existing radio equipment to add features or improve performace
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Controlling a transceiver using software running on a separate personal computer. See also: [software-defined-radio], [audio-interface].
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Questions about the practice of, and legal requirement to, identify your transmissions using your call sign.
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the frequency range 3-30 kHz.
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Questions about shortwave listening and similar low-frequency reception activities.