Radio for Preparedness 101: HF radio bands and propagation
15:24
Radio Wave Propagation Basics - Where do Signals Go - and How?
20:30
Best PORTABLE HF Radio with 100 Watts | Best HF Ham Radio
45:41
Radio for Preparedness 101: HF Radios for Emcomm
33:52
Radio Frequencies, Bands, Modes and Bandwidth Explained.
31:00
Anatomy of a CW QSO
16:28
HF Propagation Factors (#1173)
34:59
HF Digital Propagation Tools - A MUST Know
20:05