Re: double wound secondary (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 5 Oct 2007 12:58:10 +0800
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: double wound secondary (fwd)

2 layer coils.  If in parallel (as in Tesla service) then no effective 
change in inductance just half the resistance. If connected in series then 4 
times the inductance but useless for Tesla coil work as the end of one coil 
will be adjacent to the start of the next but with 50% of the voltage across 
it.
Does anyone really disgree with this?
Peter
http://tesladownunder.com

> ---------- Forwarded message ----------
> Date: Thu, 4 Oct 2007 22:59:07 -0500
> From: sparks@xxxxxxxxxxxxxx
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: RE: double wound secondary (fwd)
>
> That makes perfect sense, because the coil-over-coil will have twice the
> number of turns as the bifilar coil will have.  Been there, done that,
> measured it.
>
> 73,
>
> Ralph   W5JGV - WD2XSH/7
>
>
>> 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.
>
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.5.488 / Virus Database: 269.14.0/1049 - Release Date:
> 10/4/2007 8:59 AM
>
>
>