40 meter qrp portable an

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 Moselle France - SD Moselle France

SD Pas de Calais France - SD Pas de Calais France

SD French Magazine - SD Franch Magazine

UALR Call Sign Search - University of Arkansas at Little Rock's, U.S. Amateur Radio Callsign Lookup Page.

The Finnish Callbook on the Web - Finnish Call Book by Heikki Hannikainen (OH7LZB)

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

Dunestar Systems - Manufacturer of single band and multiband transceiver bandpass filters for HF. High pass filters, two radoi headphones mix and switch, 6 meter portable antenna, antenna remote switching and steering.

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

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!

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.

LZ1JZ QSL Print services - QSL printing service based Bulgaria and managed by LZ1JZ, offer from single color to full color qsl cards.

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!

QRZ Cdrom Shareware - Shareware and Freeware HAM radio software by QRZ.COM

Radio Propagation & Diffraction Calculator  ^{updated  pop} - This is a radio frequency propagation calculator for the transmission path between an RF transmitter and a receiver.

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