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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
rewired the equation for me (I had tried to rewire 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