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.
Designing antennas, selecting antennas for specific applications, properties of a given antenna design.
Radio devices that use digital signal processing in place of analog electronic components to manipulate RF signals.
299 questions
Questions specific to rules, regulations, and practices in the United States of America.
296 questions
Materials and methods for building antennas, and design of supporting (non-conductive) structures. For design of antennas themselves, use [antenna-theory] instead.
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.
240 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…
226 questions
for questions about the theory and structure of receivers.
186 questions
Transmission of digital signals over Amateur Radio, including modes like PSK-31, RTTY, JT-65, JT-9, etc.
157 questions
Questions dealing with handmade (Do It Yourself) radios and radio accessories.
154 questions
A widely used toolkit used to develop software-defined radios and general signal processing applications.
148 questions
Questions about RF propagation including measurements, beacons, modes (ionospheric, tropospheric, ground wave), etc.
146 questions
Very High Frequency is the frequency range 30-300 MHz.
146 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.
143 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.
143 questions
for questions regarding RFI (Radio Frequency Interference).
141 questions
Ultra High Frequency is the frequency range 300-3000 MHz.
136 questions
Questions about coaxial cables, including different types of cable, connectors, adapters, and other topics.
130 questions
Questions related to the licensing of amateur radio operators and stations. Please also tag your question with the relevant location.
129 questions
for questions relating to dipole antennas.
129 questions
Questions about fixed impedance matching networks, the necessity of impedance matching, etc.
128 questions
Questions about power ratings and restrictions, including maximum power by law or for certain components, or about calculating power in certain situations.
127 questions
Baofeng is a manufacturer of radio equipment. Use this tag for questions relating specifically to Baofeng products.
124 questions
for questions about which frequencies to use or not use in certain locations/situations.
122 questions
for general questions relating to transceivers.
118 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.
115 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…
114 questions
Questions which involve the properties or applications of individual electronic components.
114 questions
Amateur radio satellites refer to any artificial object in Earth orbit that are useful for amateur radio purposes.
113 questions
Discussion related to the rtl-sdr project, which enables certain television dongles and other hardware to be used as a cheap SDR receiver
111 questions
for questions related to vertical antennas, the construction, characteristics and performance.
109 questions
Devices for connecting balanced and unbalanced feed lines/antennas. Also covers questions about ununs, unbalanced-to-unbalanced connection.
102 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.
100 questions
Mobile operations (car, motorcycle, boat or other vehicle)
100 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…
98 questions
for questions relating to RF and DC grounding in radio equipment. Specifically suggested methods, practices, equipment and regulations regarding grounding.
96 questions
2 3 4 5