RE: Power Transformers

• To: "'tesla-at-pupman-dot-com'" <tesla-at-pupman-dot-com>
• Subject: RE: Power Transformers
• From: David Knaack <dknaack-at-rdtech-dot-com>
• Date: Fri, 22 Nov 1996 10:00:41 -0600

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I have used a motorized liquid rheostat for 4 years consisting of 
3 plates of 316 stainless steel operated by wind shield motor powered 
lead screw in a rubbermaid 5 gal plastic container.  The electrolyte
used was baking soda (sodium bicarbonate)and water.  The rheostat has 
successfully handled power levels up to 5kW for several minutes
(Richard Hull and Alex Tajnsek of TCBOR has witnessed and has been 
videotaped).  Advantages are:
1.  Extremely inexpensive (less than $30 for a 10kW unit) :-)
2.  Extremely robust (try blowing up a liquid rheostat, the
    railroads used them in early electric traction very successfully)..
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Could you give some construction details on this type of rheostat?
(or a URL where I can find more info? ). I think I would like to use 
this design, but this is the first I have heard of it.

Thanks!
--
David Knaack
South Texas

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