Transformer Bobbin ~ 34x36mm Window

thingiverse

Simple transformer bobbin that I made to make custom power transformers and chokes with old microwave oven laminations. PLA is not recommended if your transformer will get hot. I had issues with the ends of the bobbin bowing out because of tight windings, so I added lips to brace the bobbin against the core once it is assembled. It works fine now. Prints in two pieces to minimize need for supports. Just glue it together when finished. Also included is a simple transformer enclosure which I have not as yet tested. I have been using these to wind 120v~450v power transformers for experimental tube amps. It also works for chokes and audio output transformers. I name my transformers to keep track of them. The one in the photo is "Borgnine." I was watching Escape from New York while I wound it.