[NLRS] "Factors Influencing F-layer Propagation at 50 MHz"

[Robert Urban]

"Factors Influencing F-layer Propagation at 50 MHz", by Roger Harrison,
VK2ZRH, is now available on the Madison DX Club YouTube Channel":
https://www.youtube.com/watch?v=-mmOVTEYsq8&t=1808s

Enjoy,
Bob W9EWZ
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