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Re: LF: Coil Calculation

To: [email protected]
Subject: Re: LF: Coil Calculation
From: "Dick Rollema" <[email protected]>
Date: Mon, 10 Feb 2003 13:46:18 +0100
In-reply-to: <[email protected]>
References: <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>
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


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