wireless 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

J-pole antenna for 915MHz - A 915 MHz four bay j-pole antenna plan

900 MHz Quagi antenna - A 10 elements quagi antenna for the 900 MHz band

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

Homebrew WiFi Antennas - Lincomatic's Homebrew WiFi Antennae, Cantenna, Toothpick Monopole, Patch Antenna, BiQuad, collinear wifi antenna all in one page

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

W1TU Ellsworth Amateur Wireless Association - Ellsworth Amateur Wireless Association, Maine USA

Portland Amateur Wireless Association - Established in 1914 and affiliated with the ARRL since 1930, the Portland Amateur Wireless Association has the distinction of being the oldest Amateur Radio club in Maine

Waterville Area Wireless Association - The Waterville Area Wireless Association was founded in 1957

K5RWK Richardson Wireless Klub - The Richardson Wireless Klub is an ARRL Special Service club of amateur radio operators based in Richardson, TX, USA.

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.

W1YK - Worcester Polytechnic Institute Wireless Association. - The Worcester Polytechnic Institute Wireless Association

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

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.

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.

Cantenna Calculator  ^updated - A circular waveguide calculator for designing cantennas include source code and windows executable by lincomatic

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.

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