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Explore the contributions of radio amateurs to the science of radio astronomy.
A must-have for all those who want to get the most out Amateur Radio mobile!
Learn how to model antennas with the free MMANA-GAL antenna modelling program, all on your PC.
A collection of popular antenna articles and experimentation from Radcom magazine.
Discover what can be achieved on the VHF, UHF, and microwave bands!
Antenna solutions for your location!
Learn how to make the best use of your location, and build a successful HF antenna!
An insight into the Amateur Radio uses for the home computer. Includes new material on Raspberry Pi.
Learn about the various types of noise radio operators experience, how noise is generated, and the most practical way to deal with it.
Details the design and construction of hundreds of amateur antennas, including some unusual designs.
Special Event Stations, DXCC Program, Operating Resources, Awards, International Operating, QSL Service, Operating Specialties, Contests, Centennial QSO Party, Logbook of the World, Amateur Code, W1AW
FCC License Info and Forms, Volunteer Instructors/Mentors, Courses & Training, Getting Licensed, What is Ham Radio, Volunteer Examiners, College Students and Educators, Amateur Radio in the Classroom, Get on the Air, License Certificates
Join ARRL/Renew Membership, Member Directory, myARRL, Membership Certificate, Membership Levels, Member Support, Member Discounts
State and Local, Technical Relations Office, Volunteer Consulting Engineer Program, Volunteer Counsel Program, Antenna Regulation and Zoning, CCR Study Information, International, Federal RFI Preemption, Federal
Public Service Honor Roll, Ham Aid, Public Service Resources, ARES, Served Agencies and Partners, NTS
ARRL References, ARRL Lab, Radio Technology Topics, Radio Frequency Interference (RFI), Tech Portal
Volunteer Opportunities, Youth, Hamfests and Conventions Calendar, Donate to ARRL, Recruiting & Outreach, The ARRL Foundation, Clubs
ARRL Publication Dealers, ARRL Store, List all Products, Periodicals, Customer Service/Support, Shipping, Product Notes
ARRL, the national association for Amateur Radio
225 Main Street
Newington, CT, 06111-1494 USA