Newbie level 4
So I have a variable current device, as I'm calling it. This controls the brightness of a bulb in a 1930's 1940s projector it works on 110v AC and controls the bulb wattage to between 250w and 500w, 500w being the upper limit of the bulb. As you can see its got a bit hot at some point in its life, I will find out what caused it, as I repair. I need to fix this, I think the only way to do it properly is to rewind, which is hard to do with this thickness of wire and get it smooth, so that the arm will travel across. I also need to make a new copper part to the arm which has melted. I could wrap it in a softer wire (resistance wire or copper?) to make it easier to get a better finish but I'm concerned that new wire will change the resistance values and potentially blow the bulb (new original bulbs very expensive £30-£40). Any thoughts on whether I have the right idea or is there something else I could do. I'm aware that the core is probably asbestos so might need a bit of Bakelite (phenolic resin sheet). Any help would be great thanks.