Winder and some coil form ideas:
- Simple hand cranked coil winder with mechanical turn counter and adjustable feed tension.
- Some fabricated coil form ideas. (Masonite, wood dowels, spools)
- Remove any ferrous bolts from core hole before use.
- Just count the turns; it's not necessary for the coil layers to lay perfectly.
- Dipping the finished choke in varnish is a nice touch.