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.
Designing and using radio systems that involve battery power sources
Questions related to fox hunting (chasing in some areas) and radio direction finding.
Low power operation, Typically 5 watts or less
Amateur radio operation on the Internet-enabled D-STAR digital voice and data protocol.
for questions relating specifically to the amateur radio UHF allocation around 430 MHz.
Questions about the phone modes, most commonly SSB on HF and FM on VHF/UHF, but also including DSB-SC, PM, or AM.
A voluntary, not regulated, division of an amateur radio band into sections for specific modes or types of operation.
Questions specific to rules, regulations, and practices in European countries.
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 …
Questions specific to rules, regulations, and practices in Canada.
Questions about fox hunting - using radio direction finding to locate a hidden transmitter - including the rules and necessary equipment.
Impedance matching transformers as related to amateur radio.
for questions relating to Slow-Scan Television (SSTV) operations.
for questions relating to protection of equipment from undesired external inputs such as overvoltages, RF coupling, and other potentially damaging inputs.
Controlling a transceiver using software running on a separate personal computer. See also: [software-defined-radio], [audio-interface].
for questions relevant to vacuum tubes, also known as thermionic valves or simply valves.
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…
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…
Questions about the use and theory of spectrum analyzers. For spectrum displays that are not test equipment, use [panadapter-and-waterfall] instead.
Questions about low-noise amplifiers (LNAs) and their application in receiving antenna systems.
A function of receivers which mutes the audio when no signal is present; there are various and mode-dependent ways of making this determination. For PL/CTCSS in particular, use the [tone-squelch] tag.
Questions about shortwave listening and similar low-frequency reception activities.
Very Low Frequency is the frequency range 3-30 kHz.