Re: Field Mill Voltmeter

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-uswest-dot-net>" <jimlux-at-earthlink-dot-net>

you should be able to turn up details of field mills...
www.sciam-dot-com/1999/0799issue/0799amsci.html 
weather.ou.edu/~fgallag/dates/oasis1.shtml 

What you need is a sensitive AC voltmeter, preferably synchronized to the
rotation rate of the vanes.  Almost any high impedance op amp amplifier
will probably do.


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