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Re: Field Mill Voltmeter

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-uswest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> Original poster: "Dr Brian H Le Page by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <B.H.Le-Page-at-surrey.ac.uk>
> I have been given the option of acquiring the mechanical parts of a field
> mill voltmeter.  The electronics are missing.  Is it possible to build the
> electronics for this equipment and are there any web resources.  Sorry the
> details are a bit sketchy but this is all I know at present.  I have not
> turned up much searching the web.
> Dr B

	Acquire them!  If you'll go to:


you will find a Scientific American Amateur Scientist article on field
mills which includes a useful circuit diagram. The circuit is probably
more complicated than necessary (any high-input-impedance AC VTVM would
be usable) it's not too complicated to build and should work fine.