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Radio Propagation


Solar X-rays:
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Geomagnetic field:
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D-Region Absorption
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Created by PA4RM

Dick Knadle, K2RIW, of Dix Hills, New York, has died. An ARRL Life Member, he was 80. Knadle was revered as a technical resource and mentor for the VHF/UHF/microwave community and was the 2010 ARRL Technical Achievement Award winner. His antenna and amplifier designs were widely copied. Knadle was a member of the Long Island Mobile Amateur Radio Club (LIMARC) for nearly 40 years. He held a bach...

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