by svarc_admin | Aug 10, 2026
Radio Frequency. A general term for the high-frequency electrical energy used to create radio signals.You will see RF mentioned in phrases such as RF power, RF interference, RF exposure, RF connectors, and RF amplifiers. In plain English, it usually means the...
by svarc_admin | Aug 10, 2026
Using radio equipment and directional antennas to determine where a transmitted signal is coming from.A recreational radio-direction-finding activity is often called a fox hunt, with participants attempting to locate a hidden transmitter.
by svarc_admin | Aug 10, 2026
The way radio signals travel from one location to another.Propagation changes dramatically with frequency. VHF and UHF communication is often relatively local, while HF signals can travel hundreds or thousands of miles under suitable conditions. Terrain, the...
by svarc_admin | Aug 10, 2026
High Frequency. The portion of the radio spectrum from 3 to 30 MHz.Many amateur bands commonly used for long-distance and international communication are located in HF. You may also hear HF casually referred to as shortwave.
by svarc_admin | Aug 10, 2026
A measure of how a circuit or device opposes alternating electrical current.You will encounter the term most often when discussing antennas, feed lines, and transmitters. Most modern amateur radio equipment using coaxial cable is designed around 50-ohm systems.
