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Coupling - ACMI trend
Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>
Hi Paul, Terry, All -
Tonight I ran Terry's coupling numbers (obtained from website) against acmi.
Terry's coupling measurements were from 0" to +15" (sec. above pri.):
(Terry's numbers are rounded to 3 out)
inch acmi Terry err%
0 0.199 0.207 3.97
1 0.171 0.175 2.51
2 0.147 0.148 0.34
3 0.126 0.124 1.45
4 0.108 0.105 3.25
5 0.093 0.089 4.73
6 0.080 0.076 5.26
7 0.070 0.065 8.19
8 0.061 0.056 9.52
9 0.053 0.049 8.38
10 0.047 0.042 11.64
11 0.041 0.037 11.11
12 0.036 0.032 11.11
13 0.032 0.029 11.89
14 0.029 0.026 13.28
15 0.026 0.023 15.04
Minimum err% appears at +2" but increase either direction from this point. Too
bad we don't have measurements below 0". Obviously, 15" is extreme, but from 0"
to +2" above primary, the err% is low which is the typical range coilers will
run and again shows the program can be very useful. Also, this is a nice flat
primary (big 10" coil) and has less err% than I saw in my range.
Terry's coil specs are at:
<http://hot-streamer-dot-com/TeslaCoils/MyPapers/sgap/sgap.html>http://hot-str
eamer-dot-com/TeslaCoils/MyPapers/sgap/sgap.html
Paul, you may want to run some of these numbers yourself - I'm still getting
use to meters (grin). Terry's pri - sec spacing appears to be about 1". My
spacing is nearer to 2", so I can see why his coupling at 0 for example is
0.207 higher than on my coil at 0.165. I may run acmi to check a what if? I
like this program!
Take care,
Bart