Radio Frequencies Band and Ranges.
33:52
Radio Frequencies, Bands, Modes and Bandwidth Explained.
27:01
Eight Tips For successful Low Power Radio Contacts.
7:18
Le ROS (TOS), Est-ce Vraiment Important?
29:24
Mike Glover Talks Ham Radio and Preparedness
22:54
Ham HF Bands: Introduction AD#29
16:44
Understanding the Radio Frequency Spectrum (#715)
20:05
Understanding HF Propagation
28:21