APRS Presentation (pdf) by Dave Luchak KL7BX
APRS Slideshow (pps) by Dave Luchak KL7BX
Hamshack Hotline by Ross Bennett KI5SR
Amateur Radio in Context by Ross Bennett KI5SR
Antenna Tuning (YouTube Video) Jerry Ritchie WA5OKO
History of PK-232 by Tom Wilbeck N5KGN
HSMM-MESH by Gary Lewis W5GL
RF Human Exposure by Tom Wilbeck N5KGN
Cross Band Repeat (CBR) by Gary Lewis W5GL
Emergency Communications by Gary Lewis WG5L
D-Star Repeater and DHAP by Gary Lewis WG5L
Digital Modes & FiDigi by Gary Lewis WG5L