Re: LF: Coil Calculation

["Dick Rollema" <d.w.rollema@freeler.nl>]

Thanks Jim!

A very nice and useful program.

73. Dick, PA0SE

At 15:57 6-2-03 +0000, you wrote:
> Dear Peter, LF group,
>
> I have used a simple DOS program coil.exe (runs OK in windows DOS box)
> which can be downloaded as coil02.zip from
> http://www.moshier.net/coildoc.html
> with reasonably accurate results for several types of coil. This
> implements one of several text-book formulae depending on what menu
> option you chose - it does loops, round and square solenoids, toroids
> etc. The Decca type basket-weave coil is probably best represented by a
> multi-layer circular solenoid (option 7). Don't forget to set the
> dimensions (option 11 - inches or cm).
>
> Do not expect very accurate results with this type of coil - all the
> formulae ignore distributed capacitance, which makes L frequency
> dependent. Multi-layer coils are obviously susceptible to this, which
> makes the apparent inductance higher.
>
> Cheers, Jim Moritz
> 73 de M0BMU