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.
Questions specific to rules, regulations, and practices in the United States of America.
Radio devices that use digital signal processing in place of analog electronic components to manipulate RF signals.
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 about RF propagation including measurements, beacons, modes (ionospheric, tropospheric, ground wave), etc.
Questions dealing with handmade (Do It Yourself) radios and radio accessories.
the frequency range 30-300 MHz.
Questions related to the licensing of amateur radio operators and stations. Please also tag your question with the relevant location.
for questions regarding RFI (Radio Frequency Interference).
Continuous Wave (CW), or Morse code over audible tones. Use this tag for any question relating to Morse code.
the frequency range 300-3000 MHz.
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.
The system composed of an antenna and a feed line, and possibly also an RF ground connection, antenna tuner, balun, phasing device, et cetera.
for questions relating to dipole antennas.
Questions about power ratings and restrictions, including maximum power by law or for certain components, or about calculating power in certain situations.
Questions about coaxial cables, including different types of cable, connectors, adapters, and other topics.
develop software-defined radios and general signal processing applications.
for general questions relating to transceivers.
a manufacturer of radio equipment. Use this tag for questions relating specifically to Baofeng products.
A device that receives a signal and re transmits it either in the same band or by re-modulating it in a different band.
Discussion related to the rtl-sdr project, which enables certain television dongles and other hardware to be used as a cheap SDR receiver
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.
for questions about which frequencies to use or not use in certain locations/situations.
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.
Mobile operations (car, motorcycle, boat or other vehicle)
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 related to vertical antennas, the construction, characteristics and performance.
Questions about fixed impedance matching networks, the necessity of impedance matching, etc.
Questions related directly to the mode of communication (SSB, CW, digital, etc).
Devices for connecting balanced and unbalanced feed lines/antennas. Also covers questions about ununs, unbalanced-to-unbalanced connection.