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Re: double wound secondary (fwd)

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Subject: Re: double wound secondary (fwd)
From: "Tesla list" <tesla@xxxxxxxxxx>
Date: Thu, 4 Oct 2007 20:37:19 -0600 (MDT)
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---------- Forwarded message ----------
Date: Thu, 04 Oct 2007 16:56:11 -0700
From: Ed Phillips <evp@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: double wound secondary (fwd)

Hi Gary, Ed

NO, I'm not saying a two layer coils has 4X the inductance of a single layer coil.

What I am saying is a close wound double layer coil will have an inductance 
approaching 4X the inductance of a BIFILAR wound coil.  The adjacent turns 
of the parallel coil causes a 1X wire diameter space winding effect, that is
not present with a two (or more) layer close wound coil.

Regards
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA USA"

	What do you mean by a bifilar coil in this sense?  I'm sure missing something here.  If the total length of the coil is the same and the two windings are in parallel then the inductance must be almost identical to that with a single winding.    How does the bifilar coil differ?

Ed

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