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Re: Topband: Progress with ugly computer noise

To: <Topband@contesting.com>
Subject: Re: Topband: Progress with ugly computer noise
From: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 4 Jul 2012 17:50:34 -0400
List-post: <topband@contesting.com">mailto:topband@contesting.com>
> Total common mode inductance is 1 times L, not two times L. This is 
> because the windings are parallel with near infinite mutual coupling. It 
> is exactly like a bifilar filament choke.

Tom,

Run it in any SPICE variant as proof that in CM, total apparent inductance 
is 2*L.  For example, two 0.1H inductors:

subckt CommModeChoke InA InB OutA OutB
L1 InA OutA .1H
L2 InB OutB .1H
K1 L1 L2 0.99999999
.ends CommModeChoke

Connect a source to InA and InB with a load to OutA and OutB.

73,

Paul, W9AC


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