I guess it depends on what you mean by "ham radio". Here's a tiny surface mount transmitter that is barely more than a gram and operates on amateur frequencies.

I guess it depends on what you mean by "ham radio". Here's a tiny surface mount transmitter that is barely more than a gram and operates on amateur frequencies. https://www.youtube.com/watch?v=wMkaN21K5S0 https://www.youtube.com/watch?v=wMkaN21K5S0 Gerber file, bill of materials, etc are freely available. I'm looking at modifying the design into a beacon for a rocket radiolocation project.