lightning protection sys

Satellite Antenna Tips  ^pop - Tips that may be of help with the most important part of an amateur radio satellite station, the antenna systems.

Russian Oblasts and prefixes - Russian callsign prefix series: RAA-RZZ, UAA-UIZ, includs Amateur callsign system in Russia

Amateur Radio Banner Exchange by G6DPP - Ham radio banner exchange system managed by david G6DPP

Electronics & Communications Classifieds - Forum based classified ads system dedicated to electronics and radios

RF Applications, Inc. - Specialized in RF Power Measurement Systems and other devices that make operating radio transmitting stations safer and easier.

Chameleon HF Multiband Antenna - The Chameleon V1 HF Multiband Antenna is a mobile antenna that can also be used as portable. Lightweight antenna system with 10 BANDS capability 6m, 10m, 12m, 15m, 17m, 20m, 30m, 40m, 60m & 80m.

Fractal Antenna Systems - Solution to your OEM needs and can meet your design or vended antenna requirements for antennas from 400MHz to 10 GHz.

Directive Systems Antennas - manufacturer of VHF and microwave antennas and related products, from 50 MHz through 10 GHz

E. H. Armstrong - Radio's premier inventor, Edwin H. Armstrong was responsible for the Regenerative Circuit (1912), the Superheterodyne Circuit (1918), the Superregenerative Circuit (1922) and the complete FM System (1933)

ADIF Specifications - Amateur Data Interchange Format, provide a standard interchange independent of operating system or programming language for amateur data that will permit easy and direct transfer of data conforming to the standard between various amateur programs as well awards and contest sponsors.

Digital Signals Sounds - Several files with examples of sounds from digital radio modes on short wave. PSK, RTTY Hellschreiber MFSK FSK Sitor

Radio Direction Finding SM5SVM - SM5SVM ARDF resources

An introduction to Repeater Systems - By Northern Alberta Amateur radio Club Nice overview of how repeaters work and protocols

CQ ZRS magazine - CQ ZRS is official S5 ham magazine, 3800 copies printed bimonthly, published by ZRS and writen by Slovene radioamateurs.

TV DX pages - General and technical informations, colour and broadcasting systems by country, frequencies

Wind Watcher Warning Systems - High wind warning system, programmable, gives progressive series of alarms at three windspeed thresholds. Can be building-mounted or made portable for storm spotters, chasers, etc. Totally unique system!

Morcom International, Inc. - Worldwide distributor of radio communications, wireless equipment, accesories and complete systems.

Custom Metalworks - Custom Metalworks - Tower and Antenna Installation, Removal and Repair. Specialists in the Installation of Rotating Tower Systems, Large Yagi Antennas and Arrays.

Andrews Communications Systems - Australian dealer, HF linear amplifiers, power supplies, baluns, HF UHF yagis and verticals including multiband HF verticals.

AirNav Selcal Decoder - AirNav Selcal Decoder enables you to decode in realtime Aviation HF Selcal transmissions. It only needs an HF airband receiver and your Sound Card. No special hardware needed. With AirNav Selcal Decoder you do not need any other hardware decoding system. Just your PC and the Sound Card.

X-APRS - APRS™ for Linux is a multifaceted system for use with packet radio by Hams, it allows the monitoring of real time geographical information such as the position of vehicles, the status of weather, radio direction finding and much much more. It envolves mapping, GPS tracking, packet radio, etc

X Text System home page - XTS is a teletext server for packet radio under linux with many functions. It can execute command...

Bonito RadioCom - Decode digital and analog signals out of any high quality Transceiver or Receiver, works as a DSP-analyzing system

WinPack  ^pop - Popular ham radio packet windows application. By G4IDE (RIP)

Duplex 144 432 - A full duplex antenna system for 144 432 Mhz