RE: Foam transformer problem
If you are trying to build a Foam hot wire transformer for cutting foam with,you can save ALLOT of time and trouble by simply getting a ELECTRIC TRAIN power supply! No wiring needed,and simple to use. I've been using them for years! You plug in into the wall,and where the 2 out plugs are,that go to the tracks,you hook one side to one side of your bow,and the other to the other side of bow. Then just turn the trains speed dial up to a setting that heats the bow's hot wire,and your all set!
Hope this info helps you out, Art