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*To*: tesla@xxxxxxxxxx*Subject*: Re: the mechanical engineering problem*From*: "Tesla list" <tesla@xxxxxxxxxx>*Date*: Fri, 12 Jan 2007 12:07:46 -0700*Delivered-to*: testla@xxxxxxxxxx*Delivered-to*: tesla@xxxxxxxxxx*Old-return-path*: <tcmlmod@xxxxxxxxxxxxx>*Resent-date*: Fri, 12 Jan 2007 12:07:45 -0700 (MST)*Resent-from*: tesla@xxxxxxxxxx*Resent-message-id*: <ntc6UcEOSMK.A.9p.By9pFB@chip1>*Resent-sender*: tesla-request@xxxxxxxxxx

Original poster: "resonance" <resonance@xxxxxxxxxxxx> Very interesting. Thanks for the input Mike.

Dr. Resonance

Hi DC,I'd be happy to silver plate your primary, as I am well versedin that. I used to work in a research lab doing all kinds ofelectrochemisty, including once even fixing an induction furnacewho's silver plating had tarnished away over the years and quitworking. I put a better plating on the parts than the originalmanufacturer did. That's beside the point.I deleted the earlier emails on this thread but seem toremember you planned to run this monster at about 20kHz. Let mepoint out a lil something I thought about. From the information Ihave, The skin depth (based on copper, but probably close) at 10kHz is 0.66 mm. So for fun, I did a lil caclulation based on anassumption that the skin depth for silver at 20kHz is about 0.5mm. I know I should be more precise, but I'm lazy tonight.First of all your perimeter of the bus bar is (5 + 1/4 + 5 +1/4) * 2.54 cm/ in. or 26.67 cm. Then, 1 ft length is 12 *2.54 or 30.48 cm, giving you an area of 812.9 sq. cm. per footof bus bar. Now multiply that by 0.5 mm (or 0.05cm), you get40.645 cu. cm per foot if you wish to have ALL silverconducting. At a diameter of 26 ft, this leads you toneed pi*26*40.645 cu. cm of silver. Multiply that by thedensity of 10.5g/cu. cm and divide by 31.1 grams/troy oz. Thisshows you will need over 1100 troy oz of silver just for that firstturn. I think you might gain about 5% better conductance foryour $$. This was just an estimate....but you see where I'mcoming from....might be a lot cheaper to go to six inch busbar. It also depends on how thick you want the silver plating tobe. I honestly can't say at this moment if there's reallyanything to be gained by plating the bus bars.Mike

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