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The Homebrew Slim Jim Antenna Gain - Slim Jim antenna gain

What tuners do - How atenna tuners works and what are real effects on feed lines and maximun power output by G3TXQ

AT Forum - AT Forum managed by Bob, 26AT026

Sugar Delta Italia - The Official Sugar Delta Italy website With all the information about the SD group in Italy.

SD Venezuela - SD venezuela

SD Moselle France - SD Moselle France

SD Pas de Calais France - SD Pas de Calais France

SD French Magazine - SD Franch Magazine

Canadian Amateur Radio Callsign Database - Search engine is provided by Radio Amateurs of Canada.

The Radio Amateur Satellite Corporation - AMSAT NA official web site.

Jefferson County Amateur Radio Club - Jefferson County Amateur Radio Club - Arnold, Mo

Radio Gateway by IKXHT - "The project ""Internet on the Air!"" Radio Gateway project"

Kantronics - Kantronics produce Modems, Tnc, Kam, Marine, wireless modems. Packet radio communication devices, HF E-mail, paging, GPS tracking, weather data gathering, or wireless data transmission.

Yaesu  ^pop - Yaesu official web site

Lazy Dog Engineering LLC - Manufacturer of software-defined radios and portable antennas

USNO Mater Clock Time - Time reference from USNO, USNO Time in Standard Time Zones,USNO Master Clock Time Animated GIF Clocks, Analog Java Clock, Compute Local Apparent Sidereal Time, Check your local System Clock vs. our Master Clock!

Meteoritos y Recursos GeolĄgicos del Espacio - Spanish only website with mail list and meteor showers reports.

Digital Communications Conference - Hams convene each year at a Digital Communications Conference to evaluate and further the state of the art. TAPR's webserver provides conference papers from previous DCCs as well as information about the upcoming DCC.

SPACEWARN Bulletin - The SPACEWARN bulletin is intended to serve as an international communication mechanism for the rapid distribution of information on satellites and space probes.

NAVSTAR GPS Timing Operations - NAVSTAR GPS Timing Operations, USNO GPS Data & Information Files Global Positioning System Overview Current GPS Constellation, GPS Time Transfer Operations, GPS & Glonass Satellite Visibility

Celes Trak - NORAD Two-Line Element Sets, FAQ, and related informations.

Near-Realtime MUF indicator  ^pop - This is a highly informative map that can be used by amateur and professional radio communicators to determine maximum usable frequencies for any world-wide path at the indicated UTC (Zulu) time.

NA7EM QSL Card design - Offer custom design and printing of extremely high quality, very affordable, QSL Cards.

Antique Electronic Supply - Antique Electronic Supply has a complete line of vacuum tubes. We feature Svetlana vacuum tubes for amateur radio, broadcaasting and audio applications. We have over 700,000 new old stock tubes to choose from. We also have a complete line of transformers, featuring Hammond and One Electron. Capacitors, resistors, parts, books, etc. Most orders shipped within 24 hours. Major credit cards accpeted. E-mail for free catalog!

Weather Net - Complete weather reports from USA Puerto Rico US Virgin Islands and Guam/Marianas