Consider only Canada law:
- Suppose someone has no amateur radio license, can he build a radio transmitter?
- Suppose someone has amateur radio license, can he build a radio transmitter?
- If people want to build a radio transmitter by their own, what to do/get first?
I do not find a single piece of information about such case on Internet yet. However, I see some Youtube video(in USA) that builds a mini radio transmitter at home, also, those components could buy from some large/well-known website like DigiKey directly and it looks that it is fine to ship to Canada(not tried). In addition, even not buy components, for Electronic Engineer, they could build their own radio transmitter from ground up. I am not sure exactly what is the rules about these DIY case in Canada. From Number 3, these DIY radio transmitter does not in exempt list.