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An antenna for 7MHz local contacts - This article describes the design of an antenna for local contacts on 7MHz, including a simple and efficient matching system that presents a 50 ohm load to the transceiver.

HF Antenna Switch - The purpose of this remote antenna switch was to be able to select between four different antenna combinations The unit was designed to work at RF power levels of around 100 watts by G8JNJ

The Coaxial Line - Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses

[TowerTalk] Open Wire Line - Discussion about open wire line on tower talk

A Portable Antenna Matching Unit - A small HF antenna tuner project for qrp operations. Includes circuit diagrams pictures and test results by GW4ALG

High Performance 802.11 Antenna - It is cheap and simple and has a gain of about 17 dBi.

The N9RET beacon - Located at grid square EN61bu, in the heart of West Suburban Chicago, Illinois

N8YEL - Zeeland, Michigan

Islands Of Scotland Award - Launched in the mid-90s, the Islands Of Scotland Award, IOSA, has achieved world-wide popularity and recognition

W9DUP Dupage Amateur Radio Club - Serving Chicagoland for over 50 years

Michigan VHF - promote VHF-UHF activities throughout the State of Michigan

Big Rapids Area Amateur Radio Club - BRAARC, Big Rapids is located in central Michigan

KC8VTO Barry Amateur Radio Association - BARA is an ARRL affiliated club in Barry County, Michigan, which is located in the southwestern part of the Lower Peninsula.

W8YDK Milford ARC - The Milford Amateur Radio Club, Established in 1961 Milford, Michigan

Chicago Police Scanner live - Police radio scanner live streaming broadcast using ustream.tv

Weller - Soldering machines and irons

Signametrics - Digital Multimeters - Signametrics corporation, manufacturer of precision digital multimeters, lcr meters, and switching cards for pci and pxi chassis

HxPI Radio - First Steps Radio - First steps in science and technology. First steps radio. Color graphics and simple explanations of basic concepts in radio. An introduction to radio communication as a technical hobby. Resources for teaching, training, learning, self-study. Modern morse code. Morse code in the 21st Century. Morse code as a technical hobby. Morse training and practice material. Exercise files to download.

DVX Project - Digital Voice Transceiver Project This Project began to explore the use of the DVSI AMBE 2020 voice compression chip and also the ADF7021 single chip VHF RF Transceiver from Analog Devices.

Digital Voice Dongle Project - This project is to create a small board that when plugged into a PC USB port, will provide an interface to a DVSI digital voice VOCODER chip.

Radiosonde : how to listen to them - Frequencies and location of every meteo radiosonde launching centres in Europe. Equipments, antennas, history, SondeMonitor and BalloonTrack tutorials

Hellschreiber machine - Pictures of Hellschreiber machines as projected by Rudolf Hell

QST Browser - A Mac OS X application for searching and viewing the back issues of periodicals that are published by the ARRL in CD-ROM format.

The Nearly Perfect Amplifier - Original manuscript for what became "The Nearly Perfect Amplifier", discussion of some design features that would be present in a perfect, or near-perfect, amplifier.

Economical keyer - Using the PicoKeyer chip. Features a 60 character memory, setup & message entry using a paddle and no battery is required to retain the memory.