> it would be far simpler to coil the NiCr wire and put it right > inside the copper pipe such that no copper is touched. My only > concern is that the high point temperature at the wire will overheat > the wax initially Plus you'd lose the advantage of a large hot surface area in contact with the wax and wouldn't be able to use a stirrer easily Joe --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .