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.

Questions about the design, selection, building, testing, mounting, or properties of antennas. See also specific tags: [antenna-theory], [antenna-construction], [dipole], etc.
967 questions
Designing antennas, selecting antennas for specific applications, properties of a given antenna design.
445 questions
Radio devices that use digital signal processing in place of analog electronic components to manipulate RF signals.
310 questions
Questions specific to rules, regulations, and practices in the United States of America.
309 questions
Materials and methods for building antennas, and design of supporting (non-conductive) structures. For design of antennas themselves, use [antenna-theory] instead.
289 questions
Questions regarding laws or other legal regulations pertaining directly to amateur radio. Also tag your question with the relevant location. If in doubt, always seek professional legal advice.
248 questions
The frequency range 3-30 MHz. HF radio waves often propagate by bouncing off the ionosphere, allowing communication between continents. This tag may also be used for questions about the 160 meter ban…
245 questions
for questions about the theory and structure of receivers.
192 questions
Transmission of digital signals over Amateur Radio, including modes like PSK-31, RTTY, JT-65, JT-9, etc.
162 questions
Questions dealing with handmade (Do It Yourself) radios and radio accessories.
161 questions
Very High Frequency is the frequency range 30-300 MHz.
157 questions
for questions regarding RFI (Radio Frequency Interference).
153 questions
Questions about coaxial cables, including different types of cable, connectors, adapters, and other topics.
153 questions
A widely used toolkit used to develop software-defined radios and general signal processing applications.
153 questions
The system composed of an antenna and a feed line, and possibly also an RF ground connection, antenna tuner, balun, phasing device, et cetera.
152 questions
Ultra High Frequency is the frequency range 300-3000 MHz.
148 questions
Questions about RF propagation including measurements, beacons, modes (ionospheric, tropospheric, ground wave), etc.
147 questions
Anything to do with wire antennas, including how to build one, how different wire antennas perform, how to tune them or when to use a balun, and what types of wire work best in certain antennas.
147 questions
Questions about fixed impedance matching networks, the necessity of impedance matching, etc.
145 questions
for questions relating to dipole antennas.
138 questions
Baofeng is a manufacturer of radio equipment. Use this tag for questions relating specifically to Baofeng products.
136 questions
Questions related to the licensing of amateur radio operators and stations. Please also tag your question with the relevant location.
135 questions
Questions about power ratings and restrictions, including maximum power by law or for certain components, or about calculating power in certain situations.
135 questions
for questions about which frequencies to use or not use in certain locations/situations.
130 questions
for general questions relating to transceivers.
128 questions
A device that receives a signal and re transmits it either in the same band or by re-modulating it in a different band.
126 questions
for questions related to vertical antennas, the construction, characteristics and performance.
122 questions
Continuous Wave (CW), the modulation mode of switching a carrier on and off to encode information, or sending Morse code tones over AM or FM modes. Questions that are about Morse code alone and not ab…
121 questions
Amateur radio satellites refer to any artificial object in Earth orbit that are useful for amateur radio purposes.
118 questions
Questions which involve the properties or applications of individual electronic components.
117 questions
Discussion related to the rtl-sdr project, which enables certain television dongles and other hardware to be used as a cheap SDR receiver
113 questions
Handheld Transceiver, or Handie-Talkie. A hand-held radio that looks like a large walkie-talkie, capable of transmitting and receiving amateur radio bands. Often can receive other bands as well.
111 questions
Devices for connecting balanced and unbalanced feed lines/antennas. Also covers questions about ununs, unbalanced-to-unbalanced connection.
106 questions
Impedance is the measure of the opposition that a circuit presents to an alternating current when a voltage is applied. This is a force of much interest to the radio amateur especially surrounding th…
106 questions
Mobile operations (car, motorcycle, boat or other vehicle)
105 questions
for questions relating to RF and DC grounding in radio equipment. Specifically suggested methods, practices, equipment and regulations regarding grounding.
104 questions
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