how much type of diode

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.

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

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

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.

Yaesu  ^pop - Yaesu official web site

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

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

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.

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

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.

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.

Propagation Forecast by AD5Q - 11 Years of monthly propagation reports from February 1988 to January 1999 by AD5Q

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!

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

Antenna Software at QRZ.com  ^pop - Large collection of radio related software at QRZ.com web site.

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

Software by Swiss ATV - Small collection by Swiss ATV association

DIGTRX - High definition SSTV software for windows 2000, xp by PY4ZBZ

SSTV FAX WX Software  ^pop - A very clomplete ham radio software collection for SSTV, FAX, and WX