operating systems

Design a J-pole Antenna - Enter the operating frequency in MHz to calculate the dimensions for your J-pole.

Verticals. Ground systems and some history - Article gives a good overview of the basics and reflects the accepted wisdom from BC antenna work.

The ZS6BKW Multiband HF Antenna - Antenna design from ZS6BKW (G0GSF), similar to the G5RV, but it actually resonates on five bands It’s only 90 ft long 27.51 m, with a 40 ft 12.2 m downlead

W6WGZ Madera County Amateur Radio Club - The Madera County Amateur Radio Club was formed for public service, education, scientific and recreational purposes of amateur radio and to elevate the standards of operating practices and ethics in amateur radio communications. San Joacquin Valley California

N6FQ Fallbrook Amateur Radio Club - It is our purpose to further the exchange of information and cooperation between members, to promote radio knowledge, fraternalism and individual operating efficiency

KA6NCR Relay Repeater Club - Welcome to the relay repeater club. we are a 2 meter/vhf amateur (ham) radio club in arcadia, california, operating on the ka6ncr repeater. we are looking for new members.

W6AF Oroville Amateur Radio Society - It is our purpose to further the exchange of information and cooperation between members, to promote radio knowledge, fraternalism and individual operating efficiency. Based in Oroville, CA

N1KT-Housatonc Amateur Radio Club - The Housatonic Amateur Radio Club was formed in 1995 to foster the development of Amateur Radio and advanced Ham Radio operating techniques, both through theory and on the air practice.

N4EH Lake Monroe Amateur Radio Society - The Lake Monroe Amateur Radio Society serves Seminole County and Central Florida, operating two 2 meter repeaters on 147.285 +600 and on 146.805 -600

Lincoln Amateur Radio Club - Everything you need to know about how to being a ham. Classes, testing, operating various modes and equipment

The South Jersey Radio Association (SJRA( - The oldest continuously operating amateur radio club in the United States

N2OB Old Barney Amateur Radio Club - OBARC is an active organization participating in field day, various operating events, special events and contests

Long Island Amateur Radio Club - 575-Long Island Amateur Radio Simplex Club, Operating locally on 147.575 FM Simplex from Grid Square FN-30

W2RDX The Rochester DX Association - Founded in 1947 in Rochester, NY, the Rochester DX Association is an amateur radio organization dedicated to the art and science of DX operating and contesting.

K5DX The Texas DX Society - The Texas DX Society, founded in 1970, is an organization of radio amateurs in Houston, Texas who have a primary interest in DX chasing and contest operating on HF, VHF, and UHF

European PSK Club - The European PSK Club, or EPC for short, is an informal club of amateur radio operators dedicated to maintaining high levels of amateur radio communications on PSK modes. Its purpose is to promote activity and good operating practice on the PSK modes on all amateur bands

Ginlong Technologies - World leading specialist in manufacturing, providing design services for small scale wind turbine systems and parts (<30kW)

Unified Microsystems - W9XT contest card DVK Digital Voice Keyer, morse keyers CW memory keyer, beacon CQ IDer, USB interfaces and more for ham radio operators

BridgeCom - FM Repeaters & LTR Controller Combined manufacturer Dedicated to providing you affordable, reliable and feature-rich communications equipment that Goes the Distance.

W7DIN Desert Intertie Network - privately owned network of OPEN, Linked Repeaters operating in the Yuma area under the Club Callsign of W7DIN.

K6MVR MVRC Radio Club - The Mt.Vaca Radio Club (Call sign K6MVR ) owns and operates repeater systems in and around Sacramento, California. The systems provide reliable coverage for mobile stations throughout the Sacramento Valley region and beyond to Modesto, Chico, the Sierras, and parts of the Bay Area.

Why is Morse Code Still Used? - Interesting article by WY3A explaining benefits of operating CW

PSK31 Overview - Brief overview of PSK31 and basic operating techniques.

PacketRadio primer - The Packet Radio beginners guide to packet radio operating by Buck Rogers K4ABT

ND5S6 160 meters operations - Antennas and operating note on 160 meters