[Prev][Next][Index][Thread]
Re: k - Alternative Method
-
To: tesla-at-grendel.objinc-dot-com
-
Subject: Re: k - Alternative Method
-
From: jim.fosse-at-bdt-dot-com (Jim Fosse)
-
Date: Wed, 13 Mar 1996 15:12:36 GMT
-
>Received: from bdt.bdt-dot-com (root-at-bdt-dot-com [140.174.173.10]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with SMTP id IAA05527 for <tesla-at-grendel.objinc-dot-com>; Wed, 13 Mar 1996 08:15:06 -0700
tesla-at-grendel.objinc-dot-com On Thu, 7 Mar 1996 11:00:50 +0700, you wrote:
>>From MALCOLM-at-directorate.wnp.ac.nz Thu Mar 7 01:20 MST 1996
>>Received: from rata.vuw.ac.nz (root-at-rata.vuw.ac.nz [130.195.2.11]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with ESMTP id UAA09571 for <tesla-at-grendel.objinc-dot-com>; Wed, 6 Mar 1996 20:18:35 -0700
>From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
>To: tesla-at-grendel.objinc-dot-com
>Date: Thu, 7 Mar 1996 16:19:39 +1200
>Subject: Re: k - Alternative Method
>
>> Ls = Secondary Inductance
>> Lp = Primary Inductance
>>
>> then
>>
>> Lx = Lp + Ls +2M
>> Ly = Lp + Ls -2M
>>
>> So
>>
>> M=(Lx-Ly)/4
>
Malcolm and Ed,
While look through the ARRL handbook for something else, I
came across this formula for calculating k = ( 1- L2/L1)^1/2. that is
the square root of 1 minus the ratio of the primary inductance with
the secondary shorted to the primary inductance with the secondary
open. Measure the primary inductance, call it L1. Measure the primary
inductance with the secondary shorted, call it L2. done.
I'll give it a try as soon as my LCR bridge arrives.
jim