Re: Copper sulphate as electrolyte

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ludev-at-videotron.ca>

Hi J.B.

Do you have a cheap source suggestion for copper sulphate, I'll
need some for a big adjustable water resistor soon.

Cheers,

Luc Benard

Tesla list wrote:
> 
> Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>
> 
> J.B.,
> This is interesting. I'll be looking forward to what your conclusions are.
> I assume you have a duplicate of
> Brine caps to compare to?
> 
> Take care,
> Bart
> 
> Tesla list wrote:
> 
> > Original poster: "J. B. Weazle McCreath by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <weazle-at-hurontel.on.ca>
> >
> > Hello Coilers,
> >
> > I've finally completed my bucket cap using copper sulphate as the
> > electrolyte rather than the more customary brine solution.  I've
> > taken precautions to insure accuracy in my comparisons.
> >
> > I disolved 500 grams of the copper sulphate crystals into 8 litres
> > of distilled water, then after thoroughly mixing, I filled a dozen
> > of the regular sized Corona beer bottles and the bucket itself to
> > an even level.
> >
> > The electrodes in both the bottles and the bucket where cut from a
> > length of 1/2 inch copper water pipe.  Leads from the pipes to the
> > terminals are no. 6 copper wire.  I did not use any oil floating
> > on the surface of the copper sulphate.
> >
> > My Fluke meter measured a capacity of 0.011 uF. which is very close
> > to the calculated value based on .0009 uF. per bottle.  I've tried
> > it in direct replacement of a similar valued brine cap, and can see
> > no appreciable difference in performance of the test coil.
> >
> > My main reason for this trial cap is to see if the lack of corrosion
> > on the copper electrodes over time, as is experienced with brine, is
> > a signifigant concideration...time will tell, but I suspect that I'll
> > not see near as much corrosion using copper sulphate as I did with
> > the brine electrolyte.
> >
> > 73, Weazle, VE3EAR/VE3WZL
> >
> > Listening: 147.030+ and 442.075+
> > E-mail:    weazle-at-hurontel.on.ca
> >            or ve3ear-at-rac.ca
> > Web site:  www.hurontel.on.ca/~weazle