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Geomagnetic field:

D-Region Absorption
Prediction:

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GMRS	WQZQ564

Certified in Radiological Monitoring and Fallout Shelter Management 1971 - 1973.

Tune in to 640 or 1240 kHz for more information. Oh, wait. That was before 1963.

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Technical Briefs

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Title	Modified Date	Author	Hits
Cutting the Cable	22 August 2023	Written by Rick Swenton	3386

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