how does the two tone os

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

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

SD Moselle France - SD Moselle France

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

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.

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

OH3TR ATV Pages - OH3RTR ATV Repeater, and some local ATV inventions like a two-stage 23 cm preamp.

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

NASA Astrobilogy - Lots of cool documentation from the astrobiology NASA division, with references to meteors observations

ON4VT sstv pages - ON4VT SSTV and personal page, includes a large software review, introduction for beginners and webcams showing sstv on the net

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.

HF-FAX - The home of Radio Facsimile wefax & SSTV.

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.

NOAA Dailiy Reports - Report of solar & geophysical activity

Popagation studies committee Priority listing - This page is about the RSGB's Propagation Studies Committee, its work, services and current projects, together with guides to where to find more about matters relating to propagation on the Internet at all levels from introductory to professional. Watch this space!

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!

MEI Software - The file MEI-10.ZIP contains educational software to evaluate antenna arrays of up to 8 elements. Two types of arrays may be studied: 2D planar arrays (Yagi-Uda, Circular, etc., up to 6 elements) and colinear arrays (up to 8 elements.)

EZNEC Antenna analysis  ^pop - NEC-2 based antenna analysis software for the amateur and professional

Quickyagi - This is the place for downloading the latest DOS version of Quickyagi the freeware yagi modeling program with auto-design & optimize.

EM Scientific MININEC  ^{updated  pop} - MININEC for Windows is antenna modeling tool for the novice, student and hobbyist.

Proagation Prediction Program (DOS) - Downloadable DOS program for propagation prediction for the serious contester.

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