TSSP: List Archives

From: "Mark S. Rzeszotarski, Ph.D."
Date: Wed, 21 Feb 2001 08:51:55 -0500
Subject: Re: [TSSP] Problems with high elevation/small radius

Hello All:
At 12:29 PM 02/21/2001 +0000, Paul wrote in part:
>As you may be aware, simulations have been singularly unable to repro-
>duce f1 measurements on coils at high elevation, hence the restriction
>of the model to b < h. For example, we have
>
> mz1: bare d=0.051m h/d=6.00 sr=0.92 b/h=2.33 turns=875
> f1    885.0kHz 1048.9kHz +18.5%
> f3   2338.0kHz 2525.1kHz +8.0%
> f5   3436.0kHz 3547.5kHz +3.2%
>
> mz2: bare d=0.051m h/d=6.00 sr=0.87 b/h=2.33 turns=1310
> f1    645.0kHz  705.0kHz +9.3%
> f3   1627.0kHz 1697.1kHz +4.3%
>
> mz3012-5: bare d=0.089m h/d=3.18 sr=0.88 b/h=1.97 turns=622
> f1    665.9kHz  721.4kHz +8.3%
> f3   1591.1kHz 1694.4kHz +6.5%
> f5   2277.9kHz 2399.1kHz +5.3%
>
>from Mark Rzeszotarski's measurements.
        I have recently acquired a nice Pearson current transformer which
should improve my ability to collect good resonance data.  Also, the snow is
letting up so I may be able to work outside soon.  Can you spell out
explicitly what you want/need to sort this out more fully?  What kind of
ground plane do you expect?  I have, or can wind coils of pretty much any
h/d in the 2-4" diameter size.  I have a fairly nice coil winder.  I also
might be able to team up with Marc Metlicka to obtain independent
measurements on the same coils if that would help.  I have lots of 24, 26
and 28 AWG wire plus smaller lots of most even sizes between 18 and 32 AWG.
Regards,
Mark S. Rzeszotarski, Ph.D., MetroHealth Medical Center, Department of
Radiology, Case Western Reserve University, Cleveland OH USA


Maintainer Paul Nicholson, paul@abelian.demon.co.uk.