Which HF bands are best during the day and which are better at night? - Amateur Radio Stack Exchange
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The radio propagation
Radio Wave Propagation. VLF ( 3 – 30 KHz) and LF (30 – 300 KHz) Propagation Marc C. Tarplee, Ph.D. ARRL Technical Coordinator SC Section. - ppt download
What can we expect from an HF propagation model ?
What is the cause of this unusually long period of terrible HF band conditions? - Amateur Radio Stack Exchange
What is the cause of this unusually long period of terrible HF band conditions? - Amateur Radio Stack Exchange
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Delta Loop for 40- and 20- meter Band_016
The 2 Meter Band: Much More Than FM - The KØNR Radio Site
What is the best time of day/Band to make a contact with Hawaii from the East Coast? - Amateur Radio Stack Exchange
