national nc 400

Amateur Vertical Antenna Calculator  ^{updated  pop} - This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen.

Crossed-Wire HF Antenna - This Crossed-Wire Electrically-Steerable HF Antenna, capable of transmitting signals over the entire 1.8 to 30MHz HF range, and capable of receiving signals at much lower frequencies is basically a crossed centre-fed wire system, consisting of four thin wires brought to a central mast by G3YNH

ASA - ASA international DX-group! Enjoy the pages!

Alfa Charly - Alfa Charly International 11 meters DX group official homepage.

International Radio DX Group  ^updated - IR-DX HQ website

Homepage 19LD113 - Lima Delta International DX Group

Oscar Sierra Bravo Priority listing - The OSCAR SIERRA BRAVO is an International DX Group. We believe in promoting friendship through radio amongst all people in the world. The membership is open to ALL radio operators regardless of their nationality, age, race, religion, politacal beliefs, and their memberships with other clubs.

Max-Gain Systems, Inc. - Fiberglass for the antenna builder, Antenna Mart quads, Bandmaster quads, transmitting components, vacuum capacitors and relays, tower accessories, gin poles, remote RF coax switches, rotating side mounts, quad spreaders, quad parts, bristol wrenches, doorknob capacitors, transmitting electron tubes, and much more!

Alinco - Alinco amateur radio transceivers manufacturer. HF Radios, Mobile transceivers, VHF UHF handhelds, receivers, scanners, power supplies and accessories

Drake - Drake has been a manufacturer of electronic communications equipment for over 50 years. Our reputation for producing quality American made equipment has been well earned and is respected internationally. Today Drake produces equipment for various markets around the world.

International Components - International Components Corporation has an extensive range of electronic components consisting of audible signal devices, speakers, microphones, capacitors, electron tubes, connectors, and accessories designed in recognition of the diversity of applications and special characteristics encountered by designers in today's complex world.

Getting Started with Sound Card Digital Modes - Setting your Amateur radio station up to operate the wide range of modern radio software which uses the PC sound card to generate and receive signals. Murray Greenman ZL1BPU

International Meteor Organization - IMO was created in response to an ever growing need for international cooperation of meteor amateur work. Radio Observations.

The home of NuMorse and NuTest - Learn the Morse Code. Learn from random text or simulated QSO (contact) sources. Create character sequences that you find difficult. Compare your results with what the program sent and view error statistics. Take simulated tests. Sound card not essential. Evaluation version not time limited.

T.A.P.R. - TAPR, an international organization dedicated to amateur digital communications, is pleased to present this collection of information about TAPR, via the World Wide Web.

SPRE Home Page - The Spartan Packet Radio Experiment (SPRE) is an Amateur Radio (Ham radio) communications experiment. The primary mission was to test satellite tracking using amateur packet radio and Global Positioning System (GPS). SPRE was developed and built by the University of Maryland Amateur Radio Association (UMARA) with assistance from NASA, volunteer engineers, and volunteer software professionals.

NASA Shuttle - Mir Web - Find out about the latest launch and mission to the Mir Space Station or Shuttle now consolidated in a single web site

Passport to world band radio - "Passport to world band radio is the world's #1 selling shortwave publication. It zeros in on news, sports and entertainment from Afghanistan to Zambia, and includes award-winning ratings of world band radios and ""how-to"" articles by experts."

Scanning Reference - Informations about Scannings, with frequencies, information about scanning, hardware and software reviews

ComDaC Radio - Full line Amateur Radio dealer - Alinco, Icom, Kenwood, Yaesu radios, various antenna and accessory manufacturers.

Radiodan - W7RF - BIRD RF power measuring, new and used, HENRY RF power amplifiers (used HF amps), TOHTSU coaxial relays, SAMLEX power supplies, RFI chokes reduce interference, Parts parts, tubes, Used amplifiers, radios, antennas and accessories, Los Angeles, CA.

ESRC Vacuum Tubes - Sales and Purchases - With over 400,00 vacuum tubes in stock, ESRC is a major supplier of tubes for commercial and hobbyist purposes

Voice of America - The US Governament's International Broadcasting Bureau

Spy Centre - All about Spy Numbers Stations, which send coded messages to agents. Includes schedules and frequencies of stations.

RadioRaft  ^pop - RadioRaft decodes 10 different ARQ modes, 8 different FEC modes, Packet, Baudot, CW... It works with a Hamcomm interface or a radiomodem. RadioRaft offers automatic detection of modes, speeds and shift. It comes with a frequencymeter/baudmeter included, it has signal frequency tracking and a bit by bit display mode. Very easy to use. practical and fast.