Having built a few Tesla Coils recently, I can see the importance of using straight magnet wire. This is hard to do when you are using salvaged wire from old
Yoder Brothers Machinery, Used Machinery & Equipment
manual wire straightening machine, how to make a wire straightener
Wire Straightener Tool-Torial by Jem Hawkes
MD Pro, PDF, Machining
Homemade brake line tube straightener
Jay gee works - wire straightening,cutting,grinding machine
Homemade Wire straightener & cutter
Wire Straightening Helix and Number of Rollers
Servo Controlled Automatic Wire Straightening and Cutting Machine