What swr really means SWR, or Standing Wave Ratio, is one of the most important technical indicators in any transmitting radio system. It applies to CB radios, amateur radio transceivers, commercial mobile radios, marine radios, aviation ground stations, base stations, portable field setups, and almost every RF system where a transmitter feeds power into an…
Dayton Hamvention has always been more than a product exhibition. For amateur radio operators, manufacturers, dealers and technically minded experimenters, it is often the place where the next direction of the hobby becomes visible before it appears in everyday shacks, vehicles and portable stations. In 2026, Icom used the event to strengthen that impression with…
Amateur radio FM satellites are one of the most accessible ways to experience real space communication with relatively simple equipment. They allow licensed radio amateurs to make two-way voice contacts through orbiting repeaters, often with a handheld transceiver, a small directional antenna, accurate pass prediction and disciplined operating technique. Unlike large geostationary communication satellites, most…
Doppler shift is one of the most important concepts in amateur radio satellite communication. Because low Earth orbit satellites move across the sky at extremely high speed, the received frequency continuously changes during a pass. The effect is especially noticeable on UHF satellite downlinks, where the signal may drift several kilohertz between acquisition of signal…
Feeding antennas through windows is one of the most common practical problems in amateur radio, shortwave listening, CB radio, SDR monitoring, scanner reception, satellite reception and temporary field-style operation from home. The radio is inside, the antenna works better outside, and the wall between them is usually not designed with RF engineering in mind. For…
The Zamberletti Network is often mentioned in European amateur radio circles as an example of how radio amateurs can support civil protection when conventional communication systems fail. It is not simply a frequency, a club activity, or a nostalgic reference to older radio practice. It represents a broader idea: when disaster strikes and centralized communication…
