Hi Everyone, I am a mechanical Engineer, playing in the electrical word :) I was thinking about creating an inductive heater, that was based on 2 concentric pipes, with a current flow path that is from the inside pipe, through to the outside pipe, and utilizing an induction power supply to do so. I saw this style of heater in a lead melting furnace on a recent trip to Europe, and I thought it might be a fun project for me to build at home. (the furnace was a crucible with a "heating stick" inserted into it. Does anyone have any suggestions as to the math, and science behind this? I see on ebay there are many inductive heater power supplies for sale, however Im certain there will be some impedance matching/ Frequency/ Voltage parameters that will need to be optimized, I only tool a couple of electrical classes in school, and from what I gather, this sort of heater arrangement is basically a very "lossy" transmission line. Any thoughts?