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.
for questions relating to the ever popular "UHF" connector (SO-239 is the "female" type mounted on a chassis; PL-259 is the "male" connector usually found on the ends of coax).
Questions relating to determining your location or the location of a QSO based on one of the various systems of measurement (lat/lon, GPS coordinates, ARRL section, CQ Zones, ITU Zones, Maidenhead Gri…
for questions relating to protection of equipment from undesired external inputs such as overvoltages, RF coupling, and other potentially damaging inputs.
Questions about military surplus radio equipment, especially related to converting them for amateur radio use.
Matters related to amateur radio operation beyond the jurisdiction of a ham's licensing entity.
for questions about physical installations, including physical mounting of equipment and equipment interconnections.
Transporting, setting up, and operating a temporary station. For operation from a vehicle, use [mobile] instead.
for questions specifically about line of sight communications, as opposed to communications using active or passive reflectors (repeaters, meteor scatter, ionospheric propagation, etc.). …
measured, what those measurements mean and how they affect amateur radio activity.
a loop antenna having an electrically small circumference, often less than 1/10th wavelength.