April 16, 2014
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Condenser disk primed for paint
The golden disk is no more. The rough surface of polyester and aluminum foil has been sanded and coated.
The disk is now smooth and primed. The 4 legs supporting the frame have been removed and replaced with 3 supports under the the disk rim. The old legs were distorting the disk, over the legs, as the frame was too lightly made for the weight of completed disk. The new supports are under the strongest part of the disk rim and spread the weight. after several months without the legs and the application of heat the distortion went away and I was able to finish the surface.
PG with his Chief Engineer! er pest, Samurai.
After 20 pounds of Bondo and 2 gallons of primer have been applied and sanded down the dish is as smooth and true as I can get it. Next apply the surface layer. At present I lean toward metal paint, heavy laid and sanded smooth. I tried a Stainless Steel spray paint on the disk cap. That appears to work, it is tough and it conducts. As it is Nickel-Chrome it should help with the Hall effect needed to manage the EMF fields, not sure about leakage from the grains exposed edges. At least application design control should be easier. Just mask and shoot. pg