network

VSWR Loss Calculator - This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors

Impedance Matching - Article by By David Knight and Nigel Williams on Impedance Matching, basic principles, popular matching networks, L-Network solutions, materials and components in impedance matching designs

Homebrew Antenna Tuner - A simple T-network that can match any unbalanced antenna system by AA5TB

How to extend your Wireless Network - How to extend your Wireless Network by building a 2.4 gHz wifi cantenna

F5LEN Webcluster  ^pop - Webcluster F5LEN member of the European DxCluster network.

Amateur Radio Repeater Geezers United Society - Club and Repeater Network in Central Florida

N4OTC Old Town Amateur Radio Cruisers - Old Cars and Amateur Radio. This club has a repeater on site of the World Longest Running car cruise. Part of the ARRG.US network

RV Radio Network - Friends keeping in touch via amateur radio and RV's

Southeastern Asterisk Radio Networks - Interoperability solutions via Asterisk based RF Gateways - Southeastern Asterisk Radio Network (SEARN) and the Southeastern Asterisk Amateur Radio Netwok (SEAARN) are designed for the purpose of developing interoperability capabilities amongst diverse communications systems. Digital Amateur Radio Project Association - DARPA expanding the digital experience.

K7ICU Repeater Network in Tucson AZ - Live streaming audio of the K7ICU repeater

Ham Radio Nation - Ham Radio Social Networking

Communication Coil - Communication Coil, Inc. designs and produces custom, high reliability Filter Networks, RF Coils, Chokes, Inductors, Baluns, Toroids and Power Magnetics for communications

VE2ZAZ's APRS Mobile Tracker - This is a really simple setup that provides vehicule position in realtime via the amateur radio APRS network

Northern Illinois APRS Network - Home discussion group for NIAN

VHF Propagation Maps - Experimental maps that show real-time VHF propagation derived from analyzing data gathered from the APRS-IS network.

EchoIRLP - The goal is sharing technical information regarding IRLP and EchoLink network inter-operability.

PSK31 Fundamentals and Setup - Background: The PSK31 philosophy, The QPSK mode, Varicode, Sound Card DSP Setup and Operating Tips

WSPRnet Weak Signal Propagation Reporter Network - A group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power transmissions. Computer sent/received Morse signals received by amateurs and collected on an online database.

The PropNET Project - PropNET is an ad-hoc 2-way (and potentially, "more-way") RF-based digital communication network whose activity is reported on the Internet. As participating stations periodically ID and exchange data, they report their activity to an Internet data-collection hub for presentation through this web site.

ScannerCast - Lets you listen to your scanner across your own network, or via the internet. Shoutcast/ICEcast compatible broadcasting for Uniden and GRE scanners. Broadcast your audio from your PC.

K2Net - K2Net is a remote operation windows software for the Elecraft K2, and allow remote control over internet or wi-fi networks by G4ILO

HERALD P2P radio link design - Sw tool to design point-to-point multi-hop microwave links and networks, 400MHz to 58 GHz. Site/Hop Configuration; Customized Antenna & Radio Equipment Libraries; Link Budget; Path Profile Analysis ,clearance, reflections; import path profiles from SRTM maps, free download.

Class C Amplifier Matching - QST Article on what you should know about matching networks for class C RF power amplifiers

N2PK Vector Network Analyser Answers - G3SEK answers to some practical questions on builing the N2PK VNA Vector Network Analyser

N5EG VNA - This article describes a low-cost vector network analyzer that operates from 200 kHz to 100 MHz, and connects to a personal computer using a USB 1.1 interface By Tom McDermott, N5EG, and Karl Ireland