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Re: helical cap
Hello Wells, Bryan, Malcom, all
Now, I AM thoroughly confused. I thought Wells was looking
for the CONICAL inductance equation, which would be:
(please use courier font to view picture)
/\
-- o / o
| o / o
| o N turns / o
o Z / o
h o / o /
o / o /
| o / o / Angle = X
| o \ o /
-- o o ------------
|
| w | R |
|
|<-- W -->|
Center | Line
Z = Coil Width (hypotenuse length)
X = Angle of Cone
h = Z*sin(X) Effective vertical Height
w = Z*cos(X) Effective horizontal Width
W = R + w/2 Average horizontal Radius
L1 = W^2*N^2/(9*W+10*h) (Vertical Inductance Component)
L2 = W^2*N^2/(8*W+11*w) (Horizontal Inductance Component)
L = SQRT[(L1*Sin(X))^2 + (L2*cos(X))^2]
And for the guys, who work it backwards (like me), here is
the equation that gives the number of turns for a specific
inductance value. Very special thanks go to JIM MONTE, who
re-wired the equation for me (I had tried to re-wire it, but it only
resulted in "garbage in, garbage out") (:o))
N = sqrt(L) /(W * ((sin(X)/(9*W+10*h))^2 + (cos(X)/(8*W+11*w))^2 )^0.25)
>> still trying to find the actual equation. It seems to me
>> that somebody has it posted on thier web site.
>>
>> Bryan Kaufman
>
>I think it should be (r^2 * n^2)/(8a + 10h + 11r) where r = mean
>radius.
>
>?
>Malcolm
>
Hope this helped and was what your were looking for.
?????????????????????
Coiler greets from germany,
Reinhard