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The top documents tagged [ground wave direct wave]
HF Radio Wave Propagation Marc C. Tarplee, Ph.D. N4UFP ARRL Technical Coordinator SC Section
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Radio Wave Propagation. VLF ( 3 – 30 KHz) and LF (30 – 300 KHz) Propagation Marc C. Tarplee, Ph.D. ARRL Technical Coordinator SC Section
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