RE: Measuring NST current

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

Original poster: "Hansens by way of Terry Fritz <twftesla-at-uswest-dot-net>" <gldhansen-at-rcn-dot-com>



-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, December 19, 2000 2:00 PM
To: tesla-at-pupman-dot-com
Subject: Re: Measuring NST current

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

Tesla list wrote:
>
> Original poster: "davep by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<davep-at-quik-dot-com>
>
> Tesla list wrote:
> > Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>
>
> > Hi David,
>
> >         It can be done but you have to be really careful!  The voltage
> across the
> > meter is low and about near ground but if anything goes wrong at all the
> > meter will get fried.  You have to carefully make sure the meter and
leads
> > are in the 400mA current range.  The meter has to be well insulated from
> > everything else.  if the fuse in the meter blows (or was already blown),
it
> > will fry.
>
>         Sounds good to me.  If accessible, putting a bypass on the
>         fuse might help.  Also, with a bit of digging, one can come
>         up with ac milliameters for under $5 (ham radio fleas, notably...)
>         Toasting one of thosei less likely and a LOT more affordable..
>
>         best
>         dwp

        A DC ammeter/milliameter will also work if connected to the output
of a
full-wave bridge rectifier (dirt cheap) and calibrated with your DVM.

Ed

Thanks.  I was going to use it for measuring the output current of
post-shunt-removal NSTs.

Thanks,
David Hansen