WinRFCalc Free Windows RF Calculator, Learning Morse Code by the Koch Method, USA Amateur Radio Repeaters, County-Hunting Mapper, Aerial Printing Concepts, GW4ARC Rhyl and District Amateur Radio Club ..read more

FTM-500D Series 50W C4FM/FM 144/430MHz, Dual Band Digital Mobile Transceiver ..read more

Antennas/Array Phased array antennas are composed of multiple individual antenna elements that can have their phase and amplitude controlled to steer the main beam direction in real-time. They are used in radar, communications, and electronic warfare, and offer improved gain and reduced side lobes. A comprehensive document on Phased Arrays include techniques to increase the Antenna Gain and change the Radiation Pattern ..read more

Operating Modes/Packet Radio/Beginner's Guide This amateur radio website explains how to use the free AGWPE utility program to send and receive packet data using the sound card of your PC. Note that AGWPE is a Windows-only program. This website, which is hosted on SV2AGW's web site, focuses on support for the sound card packet features of AGWPE ..read more

Antennas/Theory A half wave wire that is tuned for resonance on 80m will NOT be resonant on 40m despite a precise harmonic relationship between the two bands. The End Effect is caused by a capacitive coupling between an unterminated wire end and the ground ..read more

Technical Reference/Attenuators A 40 dB tap attenuator taht need only dissipate 2.3 watts, while delivering the same 0.02 watts to the input sensor ..read more

DX Resources/DX Peditions/2023 DXpeditions DX Pedition to the Bouvet Island official web site featuring all latest news and updates from the most remote uninhabited place on Earth ..read more

The Q900 SDR is a compact and versatile all band, all mode transceiver, designed for amateur radio use. It covers a wide range of frequencies from 160 meters to 70 centimeters, and supports multiple modes of operation such as SSB, CW, AM, FM, and digital. It has a compact design and intuitive interface ..read more

DX Resources/DX Peditions/2023 DXpeditions Lesotho DX Pedition January 26 - February 4, 2023 ..read more

Operating Modes/Satellites/CubeSats RSGB page dedicated to CubeSats and FunCube satellites used by radioamateurs ..read more