Re: More Coupling...

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

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>

Kurt,

Great job! The excel spreadsheets look good. Plenty of data - acmi should
not have a problem. We will be
mulling this over for while.

Thanks again,
Bart

Tesla list wrote:

> Original poster: "Kurt Schraner by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <k.schraner-at-datacomm.ch>
>
> Hi Paul, Bart, all
>
> I did some quite extensive coupling measurements on my big coil
> (~16"dia, 10kVA, flat primary), and compared it successfully with
> Dr.Mark Rzeszotarskys great program MandK. The drawback may be, I
> did'nt have the big spacial possibilities, Paul was asking
> initially, and I have the results, so far, in Excel97 only. If
> it's of use, it can be downloaded from:
>
> http://home.datacomm.ch/k.schraner/BandW_MandK.zip  (16k)
>
> BTW the data I used for the calculations in MandK are in the
> Excel as well, but I can give perhaps more, regarding geometry of
> the situation. I'm not shure, if the precision of my mesurements
> are sufficient, to be of good use for furter ACMI testing (it's
> certainly less than yours ;-)), But it might be of some value
> too, to see the influence of variable "tap-position", in addition
> to variable "primary-height", on coupling.
>
> I also did measurements for my 8"Twin coils, again as Excel97
> file downloadable:
>
> http://home.datacomm.ch/k.schraner/8inchTC_k.zip (17k)
>
> Hope, it might help the interesting topic!
>
> Cheers,
> Kurt Schraner
>
> Tesla list wrote:
> >
> > Original poster: "Barton B. Anderson by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>
> >
> > Hi Paul and Everyone,
> >
> > My reply here is to ask (plead) for more coiers to make coupling
> measurements.
> > All that is needed is a DMM capable of volt and amp readings (or meters
> capable
> > of this). Also needed is a primary that can be moved above and below the
> > secondary base line in steps (or the secondary to achieve the same result).
> > Measurement is easy (we can define that later).
> >
> > If case you haven't kept up with this thread, I have found an increase in
> > coupling error to Paul's program "acmi" predictions (error increases in the
> > direction of increased coupling). What I would like to find out with your
> help
> > is:
> >
> > 1. is current changing during measurement (and not realized),
> > 2. is the flat primary shape causing the error,
> > 3. if #2 is correct, does acmi need to apply a correction of some type,
> > 4. if #3, is this true for only flat primary's?
> > 5. Lot's of other little tid bits to increase our coupling knowledge.
> >
> > So we need some flat, helical, and conical coupling measurements as well.
> This
> > type of comparison has been needed for some time and the information
will add
> > another little wrinkle in our coiling brains.
> >
> > Any takers? Anyone?
> >
> > Thanks,
> > Bart
> >
> > Tesla list wrote:
> > >
> > > Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> > > <paul-at-abelian.demon.co.uk>
> > >
> > > Barton B. Anderson <tesla123-at-pacbell-dot-net> wrote:
> > >
> > > <snip>
> > > The only way to take this further is with more results from other
> > > sources. If a systematic error develops, either it can be calibrated
> > > out of acmi, or I can do something smarter with the current filaments.