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Radio Propagation


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

On April 12, ARRL will conduct the Frequency Measuring Test (FMT), a tradition that dates back to 1931. In that era, prospective participants were promised “a pleasant and profitable experience” and advised that taking part in the FMT would be a form of insurance against out-of-band operation “and the unpleasant consequences that follow.” Official Observers and Official Relay Stations were requ...

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