Demystifying Radio Frequency Interference: Causes and Techniques for Reduction by Arndt, Donald J. (2009) Paperback
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NOAA’s Space Weather Prediction Center (SWPC) has reported that a brief radio blackout “event” occurred on March 29 at 1748 UTC, the result of an “impulsive” or short-lived R3 (strong) solar flare. Extreme ultraviolet radiation from the X-1 class event “sent waves of ionization rippling through Earth’s upper atmosphere and disturbed the normal propagation of terrestrial radio transmissions,” Sp…
American Radio Relay League | Ham Radio Association and Resources
The ARRL has formally complained to the FCC, contending that a “grow light” ballast being widely marketed and sold is responsible for severe interference to the MF and HF bands. The League urged Commission action to halt sales of the Lumatek LK-100 electronic ballast and to recall devices already on store shelves or in the hands of consumers. In a March 12 letter to the Commission’s Enforcement…
American Radio Relay League | Ham Radio Association and Resources