The Photo Album is a place for "Shop Shots" as well as pictures and descriptions of projects that we are working on. Show off your Shops, Machines, and your Projects!
One way to look at your furnace; If it was an older ham radio, you have to tune the transmitter to the antenna. This is what the output stage, with the capacitors, of your induction is; the tuning stage.
Patio used that as an example when he was explaining the operation of the furnace to his brother, who is a ham radio operator.
Wise people talk because they have something to say. Fools talk because they have to say something.