This is about addressing a practical problem we are facing, making good spools. They are critical for a successful experiment.
I don't have the space to host a 3D printer for now. So I need to make my own bobbins manually. Currently I'm working on a bobbin suitable for my AMCC-200 core with POC setup. It consists of these parts:
I need to make 6 copies of A, 2 of B and 6 of C. The main structure of the spool is formed by the 2 B parts.
Every B part consists of 3 sections corresponding to the 3 POCs. The C parts are kept in place by the longer teeth of the B parts.
Both the B and the C parts are closed down by the 6 A parts which give strength and rigidity to the spool.
I'm not sure I explained it clearly.
The best material I found to be fiberglass laminate sheet with cotton insertion, much like the one used for PCBs. It's an excellent electrical isolator and it's very rigid. I'm using 1 mm sheets.
I'll come back with more details and pictures.