Re: double wound secondary (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 04 Oct 2007 20:15:52 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: double wound secondary (fwd)

Hi Dave,

Some bifilar coils are wired in anti-series to reduce or cancel out 
inductance effects. Is this what you were referring to when stating your 
inductance of the dual layer was 4X as compared to a bifilar winding?

Bart

Tesla list wrote:

>---------- 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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