The Spacecraft Tech Expo features displays of spacecraft equipment and many possible spacecraft vendors. Most people don't think they can build a spacecraft but amateur radio operators launched a very small satellite to relay information over a wider area. I don't know how many transceivers they installed but the idea fascinates me.
Sorry for late posting but time is short for free passes - but I don't know cutoff. Register today if you can.
Expo is organized by the:
Commercial Spaceflight Federation
Long Beach, CA, USA