| Date | Call | Topic | Presentation |
| November 2011 | ON7UX | Fun cube (AMSAT Belgium) | Available |
| May 2011 | ON5GO | Thunder and lightning | Available |
| December 2010 | ON7DJU | TCP/IP Introduction | Available |
| February 2010 | ON5GO | Propagation | Available |
| October 2009 | ON4PN | D-Star | Not available |
| May 2009 | ON8DC | Software Defined Radio (SDR) | Available |
| November 2005 | ON5GO | Digital Radio Mondiale | Not available |