circuit design

Optimised Six-Metre Yagi - Design for a 5 element beam on a 23 foot boom with an unusual combination of performance characteristics

80 meters wire antenna  ^pop - A reduced-size 80-meter antenna designed for small lots, portable use, and a fine companion for QRP

80m 4 element delta loop antenna - A four element delta loop antenna for the 80 meter band providing a forward gain of 6 dBi by F5VKM

K8CU Log Periodic Antenna - Plans, photos, electrical and mechanical design for this HF Log periodic antenna.

Stacked Yagi Antennas - Constructing and designing full size, single band stacked yagi antenna arrays

Software for Ten-Tec Radios - Radio control and logging software for Ten-Tec Radios designed with the Contester in mind.

Summits on the Air (SOTA) - Summits on the Air is an exciting new award scheme for radio amateurs which encourages operation in mountainous and wilderness areas. The sceme is designed to grow into an international awards.

SATEDU PROJECT - SATEDU project, a 20Kg class microsatellite designed and managed by AMSAT-France, partially developped and built by students

HEX-BEAM - Traffie Technology - Hex-Beam antennas manufacturer, a new approach to beam design, using hexagonal array style, by Traffie Technology

W3FF Antennas Buddipole - The Buddipole is a hi-tech, take-apart dipole designed for HF portable operations. The antenna uses a multi-band adjustable coil for all bands 40m - 2m.

Balun Designs LLC - Balun Designs wind high quality baluns and ununs for Amateur Radio and commercial applications based on the researched and tested designs of Dr. Jerry Sevick, W2FMI.

IMAGINE QSL's Print Service - We design and print QSLs (simple,double,triple...), calendars, awards, directories... High quality at lower price

SkedWizard Priority listing - "Sked Wizard is an applet designed to help radio enthusiast get more enjoyment from their available operating time, ships with a list of ""radio related"" world band programs"

Mac Antenna Master - Dipole, Yagi, Vertical, Cubic quad, Log periodic, J-pole, coil, and transmission line design package for the Macintosh

Morse Tutor - Morse Tutor is a DOS based program written in C++. It can be used to practice morse code. Various options are available. Morse tutor with Complete Source Code and Binary is available for Download (32KB).

FT100 SuperControl - CAT control and logging software project especially developed for the YAESU FT-100 transceiver. The program is based on the design of FT847-SuperControl.

TK8500 - open source software designed to control and program the ICOM IC-R8500 receiver

TK545 - Open source software designed to control and program the Japan Radio Co. NRD-545 receiver.

TK500 - Open source software designed for the Yaesu VR-500 receiver.

TK120 - open source software designed for the Yaesu VR-120 receiver.

TK75 - Open source software designed to control and program the ICOM IC-R75 receiver

CommCat - CommCat goes beyond rig control and logging to provide many new features designed to help you work and confirm DX, and learn in the process. Free Demo download. Requires Windows 95 or later.

HAMIC - The Ham Intelligent Calculator - HAMIC, is a program designed to simplify a number of calculations commonly used by HAMs. It is designed for the HAM radio hobbyist, but may be useful to others as well. HAMIC has a simple to use, but powerful graphical interface that allows solving simple circuits such as resistors in series or parallel, or more complex circuits such as L networks or T networks. As well, other calculations such as SWR and reactance conversions are supported. Windows shareware.

ACWS: Automatic CW Sender by iz7ath - Simple circuit, with a simple push, transmit a memorized Cw messages

Homebrew resources for wireless enthusiasts - PDF resources containing information on low cost ssb,am,cw circuits, which are useful for beginners.