[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Coil dimensions - oops!

Original poster: Mddeming@xxxxxxx In a message dated 5/28/06 12:33:55 P.M. Eastern Daylight Time, tesla@xxxxxxxxxx writes: 
For a flat spiral primary,:

L=(rN)^2 / (8r+11B)
  L is in microhenries
N is number of turns
r is AVERAGE radius of coil (inches) = r(inner) r(outer) / 2
B is width of coil (inches) = r(outer)-r(inner)

As many people probably noticed this should read:

r is AVERAGE radius of coil (inches) = [r(inner) + r(outer)] / 2

That's the hazard of writing emails after 3AM :^< zzzz

Matt D.