unbalanced impedance mat

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.

Old Time Radio - Old Time Radios ! a good resource to old time-radio amataurs

IRC's Home site - Information of IRC DX group DX informations propagation and may other informations about dx and internet.

Citizens Band Mid~West - A very attractive and informative site designed to promote the professional operation and knowledge of Citizens Band Radio

Cambridge and District Amateur Radio Club - G2XV G8EVY 1919 - 2010 Promoting Amateur Radio in Cambridge for over 90 years

Essex Repeater Group - These pages provide the Latest News and information on ERG, the voice repeaters GB3DA (2m), GB3ER (70cm), GB7ZP (70cm D-Star), GB3DB (6m), and the 10GHz microwave beacon GB3CMS.

Electronics and Amateur Radio Society - University of Surrey Electronics and Amateur Radio Society (EARS) UK

Canada - RAC - Radio Amateurs of Canada

SJVARA - A small amateur radio club located in northern Maine along the Saint John River.

The Amateur Radio Elmers Resource - A complete resource for ham radio novices and OM

Darley Amateur Radio Club Online Exam - ARRL Online practice exam require Java capable browser

Workman Electronics - Amateur radio accessories, power supplies, tvi filters, speakers, microphones, swr meters, preamplifiers, switches, cable and connectors,

Icom America - Manufacturer of amateur, avionic, land mobile, marine and communications scanner & receiver equipment.

Kenwood  ^pop - Kenwood continues its strong and proud heritage as the Pacesetter in Amateur Radio. Kenwood was the first Amateur Radio manufacturer on the Web. It is our firm dedication to continue leading the way with useful website services in the future. Visit our Amateur page to learn more.

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

LDG Electronics - Automatic Antenna Tuners. Kits and assembled. Other station accessories

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.

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.

Orion Downloads - Download Ten tec Orion firmware, schematic, manuals, documentation

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

R&L Electronics - Amateur Radio, Citizen's Band Radio, Commercial Radio, General Electronic items, Marine Radio, and Short Wave Radios, Hamilton Ohio

FBB Packet-radio BBS - FBB is a freeware bulletin board software for amateur packet-radio run on DOS Windows and Linux

Scan*Star - Radio monitoring and analysis tools. Scanning, searching, spectrum analysis and traffic analysis. Amateur, Industry & Government,