When I watched this very cool video, I thought of all those hams who complain so bitterly about how difficult it is to wind a toriod on a T-50 core.
Thanks to Hack-A-Day for alerting us to this.
Serving the worldwide community of radio-electronic homebrewers. Providing blog support to the SolderSmoke podcast: http://soldersmoke.com
I think this FB video is a good place to start:
Here is his YouTube channel:
https://www.youtube.com/channel/UC_nrEDtq-0OQEVupubH_QuQ/featured