air grid

A Hairpin match for 5 el. Tonna - How to improve the gain of your 5 element Tonna yagi for 50 MHz by roughly 3 db! by PA2HJS

Speedometers SWR Meters and Smith Charts - Have wondered why a Smith chart has such strange grid lines. Believe it or not, there is a logical progression from Speedometers to Smith charts that will make the Smith grid crystal clear.

HF Antenna and Tower Raising - Raising a new tower and a pair of large beam antennas pictures and notes

K8GP Delmarva VHF and Microwave Society - K8GP web site, home of the Grid Pirates Contest Group.

International HF Grid Location Contest - International HF Grid Location Contest

IOTA Bearing & Distance list for your QTH - A list of all IOTA reference numbers and IOTA groups for the Islands On The Air award, personalised to your own QTH

ARRL Access to Amateur Radio for the Disabled - Articles for the sight impaired

QTH locator with GoogleMaps  ^pop - Laurent Haas F6FVY a nice QTH Grid Locator point and click interface using Google Maps.

Akron Antique Audio - Purveyors of Quality Vintage Tube Audio & Electronics and Vintage radios, Sales Service, Repairs & Restorations of quality vintage tube Electronics, Located in Akron Ohio

Lowe electronics - UK dealer for pmr audio accessories, batteries and cases, audio accessories and airwave tetra products

Fair-Rite Products Corp. - Ferrite components for the electronics industry

HMC Electronics - We offer brand name products including metcal, loctite, weller, hakko, kester, lindstrom, desco, fluke, 3m, xcelite, chemtronics, xuron, tech spray, excelta, intermetro, scc, luxo, ideal, micro care, and scienscope. Products for Electronic Assembly and Repair. MA USA

AVVid - Repair service - Amateur Radio Service Center, quality repair of Kenwood and Some Icom equipment, TX USA

Alpha Amplifier Upgrades - Alpha 77D,DX,SX, Alpha 76, Alpha 78 and 374 repair service and upgrade kits

WA8SAJ Drake repair service - Drake Radio Repairs by Jeff WA8SAJ

WA4GEG Repair Service - HamRadioBug.com the new home for Electronic Equipment Service. Yaesu high-end series SSB/CW transceiver repair

Ham Repair - Ham Radio repair of all major brands and models, located in Carrollton, Texas, which is just north of Dallas, and have been serving the Amateur Radio community for over 20 years.

Burghardt Amateur Center - Yaesu Kenwood Alinco AEA Icom Geochron Phillystran dealer. Offer used products, custom products external relay box, antenna input protector and repair service

Oplink solutions - Repair and refurbish electronic test & measurement equipment.

TubeCalc - Input (grid or cathode) and output (plate) tube resistances calculation according to its electrical characteristics, frequency, mechanical dimensions and working conditions.

HeliCoil - Inductance calculation for single layer, air-wounded coils and helixes up to about 800 MHz. Inductance calculations accuracy is around 1%. Also, coils with maximum Q for given inductance, resonant RF chokes, PI and T resistive attenuators calculations are provided. Skin effects, radiation losses and other minor side effects are not accounted in maksimum Q factor coils calculations. Program assumes using copper (Cu) enameled or silver (Ag) plated wire. Program is writen bilingual in English and Serbian by YU1AW

ILGdb - Free program that interfaces most ICOM radios with the ILG radio frequencies database and lets you click a station in the database to tune your radio to the station, or scan the list looking for stations that are on the air.

WorkedGrids - Ham Log Mapping software freeware for Windows, displays a map showing the amateur radio grid squares contacted and logged in using a third-party logging program by: Bertrand Zauhar, VE2ZAZ

FREQ DB Icom - Program that interfaces with a text file of frequencies plus other data and tunes your ICOM radio. You create this data yourself, and can use almost any data you wish. You use the program by clicking a station in the file to tune your radio to the station or net, or scan the list looking for nets that are on the air.

4CX1500 - This is a 4CX1500B grid driven amplifier that is built like a tank. The unit is considerably over designed as can be seen in the pictures documenting the construction