art simpson

Poor ground, better Beverage - Poorer conducting earth beneath a Beverage gives better performance

The Beverage Antenna Memorandum - Memorandum on the Beverage Wave Antenna for Reception of Frequencies in the 550 - 1500 Kilocycle Band", FCC Report 9.2.1, by Benjamin Wolf and Adolph Andersen

Antennas and Grounds for apartments  ^pop - Suggestions on finding RF ground when you live in an apartment and you want to setup an antenna

AERO ham radio club - W3PGA - middle rivermaryland, established in 1946 in cooperation with the Glen L. Martin Aircraft Plant in Middle River

Ak-Sar-Ben Amateur Radio Club - The Ak-Sar-Ben Amateur Radio Club, Inc. of Omaha, Nebraska is a general interest amateur radio club. With nearly 300 members there is someone involved in every aspect of amateur radio. We make a special effort to participate in providing communications support for public service events, Field Day, and teaching classes for those who wish to obtain an amateur(ham) radio license or upgrade their license privileges. The club sponsors regularly scheduled Volunteer Examiners as part of the ARRL VEC program. The club also hosts a flea market in the fall and hosts an all area picnic in the spring. There is evidence of the club as far back as the 1920s and has a long history of community service and promotion of ham radio in the city, county and state. The current club was started in 1945 the club has been affiliated with the ARRL since that time The club has hosted the Midwest Division Convention in 1985 and in 1994. Tthe club has participated in Kidz Explore in Omaha which is attended by over 77,000 people. The AARC is also involved with the radio merit badge program for the Boy Scouts with several members being registered merit badge councilors. The club operates two repeaters under their KØUSA callsign, 146.940 and 224.940. Both repeaters are open for all licensed amateurs to use. The 146.940 repeater is home to Midlands ARES and Douglas County ARES nets.

C.A.T.S, Rotor Doc - Manufacture CATS antenna rotator and digital controls. Service, stock, and provide parts for top quality AMERICAN-MADE antenna rotators from companies such as Alliance, C.A.T.S., CDE/Hy-Gain, and Channel Master, both young and old.

Digital Smart Antennas DiSA - Digital Smart antenna (DiSA) Automatically Adjusts over a wide band of frequencies.

The reflected W beam - Hexagonal wire beams for all hf bands, technical resource, EZNEC files, tools for antenna modeling and documentation. You can also order parts to build your own antenna.

IMEN PAYA Eng. Co. - Supplier and manufacturer of earthing & lightning protection equipment. Also provider of all electrical instrument, based in Iran.

ACARS VHF Data - The first of a series of articles that provide an introduction to the latest ICAO defined digital communication modes, including VDL modes 2, 3 and 4. In this edition we begin with the current ACARS application then bring this up to date with AOA.

Getting Started in SW Listening - Excellent and exaustive guide to shortwave listening offered by monitoringtimes, includes operating guides, technical suggestions, buying guieds, antennas implementations and more, all what is needed by shortwave listening beginners.

Radio Marti - U.S. Office of Cuba Broadcasting

Voice of Justice - Cambodia

Numbers Stations by dxing.com - Article on number stations

Salon People Counting spies - Salon.com's Article on Numbers Stations

Who operates those weird numbers stations on shortwave radio - Article on number stations

Spy Number Stations - So you want to listen to the spies?

Spy Stations and Cryptography - This article first appeared in the October 1998 issue of Monitoring Times

Introduction to number stations - long article on number stations history

Satbuster - SATBUSTER for Windows is especially designed for satellite visual observers and trackers. Its users, mainly amateur astronomers and radio amateurs, appreciate both the accuracy and the simple to use graphical interface.The software is aimed to hobbysts. However a growing number of plain folks are starting to use this tool to recognize and look at the International Space Station and the Space Shuttle during its missions too

SatEvo - SatEvo is a program to compute the decay or re-entry times of earth satellites. For objects nearing decay, it generates sets of orbital elements for each revolution. The format of the input and output element sets conform to the standard tle format accepted by many prediction programs.

Satpro - SATPRO is an earth satellite tracking software package for the IBM-PC and compatible class of microcomputers running MS-DOS. The forte' of SATPRO over other software packages is the accuracy of ephemerides produced and the number of simultaneous propagations that can be accomplished

Ballistic simulator Orbit - Ballistic simulator "Orbit" allows the physical principles of the motion in the gravitational field of the Earth to be demonstrated and learned. You can calculate with this program the ballistic trajectories of the thrown bodies and orbits of spacecrafts and visualize the astroballistic situation on the flat map of the world and on the rotating globe in the real time

Electronics and Radio Today - Electronics and Radio Today for electronics and radio information, projects parctical information and introductory articles. Especially useful for those taking GCSE Electronics in the UK and around the world.

Grounding Concepts - What is ground?RF ground and the ground plane, how can I tell if I have a good ground? ground loops