history of radio tubes

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

The Multi-Band Fan Dipole - How to build a multi-band dipole antenna with a single coax feed. Instructions for a 160M antenna that will fit in the space that a 75M dipole will with almost as good of results as a full size 160M dipole!

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

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

Delta kilo - All about CB-Radio, DX, and the DK-Club

Romeo Golf - a group of 11meter dxer's that want to share our page with other dxer's

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

International Radio DX Group - IR-DX HQ website

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.

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

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

Canada - RAC - Radio Amateurs of Canada

Spain - URE - Union de Radioaficionados Espanoles

North Bergen police live scanner - Listen to the North Bergen Police radio broadcast live, NJ

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.

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

Robert's Satellite TV page - Lots of cool stuff about satellite world

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."

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

Ten Tec eHam Reviews - eHam users review of the Ten-Tec Orion transceiver

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

Radio Components - The widest range of stocked components for the electronics, electrical and mechanical engineer.

Mouser Electronics - We are a distributor of electronic components. We provide the maximum service to the electronic buyers regardless of the size of the customer or the size of the order.

Bandercom - Radio sales to over 60 countries, source for all communication equipment, individual hobbyists, professionals and dealers.