Introduction to APRS Ron Maillone, W2TAP
Radio_Direction_Finding_Fundamentals
Foxhole_Radio_LIMARC
MILITARY NVIS-Antenna-Theory-and-Design Applications
Introduction_to_Repeaters_LIMARC_Ron_Milione_W2TAP
Introducing D-Star
A New Ham;s Guide to Using Repeaters by N4UJW
