Re: Seibt Photo

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Ed Phillips <evp@xxxxxxxxxxx>

"...Medhurst seems not working well for these coils, despite the H/D in
the
original table is from 0.1 to 50. I'm getting 303kHz (~ same your
300kHZ)
for Bart's preliminary design, and 285kHz for my coil, which compares
badly to the experimental 366kHz. I'm using the precise Lundin low
frequency inductance calculation for the coil (<1%), and my homebrew
Medhurst table fit, which has an average error of 0.67% (max. 2.7%) vs.
Medhurst's original table. In all my former designs, it has worked,
within
a few percent of SRF, same you mentioned above.

But Bart's JAVATC and FANTC, both having implemented Paul Nicholson's
GEOTC, which has more rigorous TC-physics from the TSSP project as a
base,
are performing like a champ (if not inputting silly errors like I did
recently ;-)). For TSSP, see  http://www.abelian.demon.co.uk/tssp/

I'm yet wondering, what's wrong about using Medhurst/Lundin (or even
Wheeler) for these coils, as a preliminary design tool...

Best regards,
               Kurt"

	My experience too.  I'm wondering what is happening here and plan to go
back to the source again.  However, if you're getting the same thing
it's more puzzling.  I use Lundin's inductance too but for calculations
like this using the appropriate Wheeler formulae should be more accurate
than the assumptions.

Ed