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.
Questions specific to rules, regulations, and practices in the United States of America.
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.
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…
for questions about the theory and structure of receivers.
Transmission of digital signals over Amateur Radio, including modes like PSK-31, RTTY, JT-65, JT-9, etc.
Questions dealing with handmade (Do It Yourself) radios and radio accessories.
Very High Frequency is the frequency range 30-300 MHz.
A widely used toolkit used to develop software-defined radios and general signal processing applications.
Questions about coaxial cables, including different types of cable, connectors, adapters, and other topics.
for questions regarding RFI (Radio Frequency Interference).
The system composed of an antenna and a feed line, and possibly also an RF ground connection, antenna tuner, balun, phasing device, et cetera.
Questions about RF propagation including measurements, beacons, modes (ionospheric, tropospheric, ground wave), etc.
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.
Ultra High Frequency is the frequency range 300-3000 MHz.
Questions about fixed impedance matching networks, the necessity of impedance matching, etc.
Questions related to the licensing of amateur radio operators and stations. Please also tag your question with the relevant location.
Questions about power ratings and restrictions, including maximum power by law or for certain components, or about calculating power in certain situations.
for questions relating to dipole antennas.
Baofeng is a manufacturer of radio equipment. Use this tag for questions relating specifically to Baofeng products.
for questions about which frequencies to use or not use in certain locations/situations.
for general questions relating to transceivers.
A device that receives a signal and re transmits it either in the same band or by re-modulating it in a different band.
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…
for questions related to vertical antennas, the construction, characteristics and performance.
Amateur radio satellites refer to any artificial object in Earth orbit that are useful for amateur radio purposes.
Questions which involve the properties or applications of individual electronic components.
Discussion related to the rtl-sdr project, which enables certain television dongles and other hardware to be used as a cheap SDR receiver
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.
Devices for connecting balanced and unbalanced feed lines/antennas. Also covers questions about ununs, unbalanced-to-unbalanced connection.
Mobile operations (car, motorcycle, boat or other vehicle)
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…
for questions relating to RF and DC grounding in radio equipment. Specifically suggested methods, practices, equipment and regulations regarding grounding.