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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!
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.
A collection of HF antennas, including horizontal, vertical and loop, plus traditional and new antenna designs.
Special Event Stations, DXCC Program, Operating Resources, Awards, International Operating, QSL Service, Operating Specialties, Contests, W1AW, Centennial QSO Party, Logbook of the World
FCC License Info and Forms, Volunteer Instructors/Mentors, College Students and Educators, Courses & Training, Getting Licensed, Amateur Radio in the Classroom, Volunteer Examiners, What is Ham Radio, Get on the Air
Join ARRL/Renew Membership, Member Directory, myARRL, Membership Certificate, Membership Levels, Member Discounts, Member Support
Federal, State and Local, Technical Relations Office, Volunteer Consulting Engineer Program, Volunteer Counsel Program, Antenna Regulation and Zoning, CCR Study Information, International, Federal RFI Preemption
Served Agencies and Partners, Public Service Honor Roll, ARES, Ham Aid, NTS, Public Service Resources
ARRL References, ARRL Lab, Radio Technology Topics, Radio Frequency Interference (RFI)
Donate to ARRL, Volunteer Opportunities, Recruiting & Outreach, The ARRL Foundation, Youth, Clubs, Hamfests and Conventions Calendar
ARRL Publication Dealers, ARRL Store, List all Products, Periodicals, Shipping, Product Notes, Customer Service/Support
ARRL, the national association for Amateur Radio
225 Main Street
Newington, CT, 06111-1494 USA