by ravzz » Thu Aug 23, 2007 1:02 am
Hi Hydrocars,
Well youre almost spot on! the resistance wire restricts the current draw into the WFC. Try it before the inductor and after the inductor...see which gives the highest output. You dont need the resistance wire during the conditioning of the tubes its only for reducing the current draw.
Even I didnt know what this was for.....Dave told me that it would reduce the current draw when used.
Tell them that you need a bright anneal in nitrogen or argon atmosphere. Annealing is done after every cold work operation and at the finishing stage to reset the lattice structure. As we are cutting the pipes and slightly finishing the surfaces with sand paper to remove any imbedded impurities during tube drawing....its all cold working....so you need to relieve these induces stresses in the lattice through annealing. Im a metallurgist Hydro so you can stay assured about this. Its normal manufacturing procedure.
Which grade of SS are you using?
What are thicknesses of the tubes?
Are they seam welded or seamless pipes?
Ravi