Re: A photographic tutorial of Pancake Coil winding...with movies...(fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 20 Jun 2007 04:16:16 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: A photographic tutorial of Pancake Coil winding...with
    movies...(fwd)

Hi Dave,

Just the opposite. A third coil not in resonance acts more like a 
capacitively coupled topload object and the dimensions of the coil. The 
third coil is pretty much a pipe at that point. In Jeff's case, it's 
nothing more than a topload object. In your coil, the solenoid is acting 
like Jeff's pipe (just a topload object).

Take care,
Bart



Tesla list wrote:

>---------- Forwarded message ----------
>Date: Thu, 21 Jun 2007 07:53:55 -0500
>From: David Thomson <dwt@xxxxxxxxxxxx>
>To: 'Tesla list' <tesla@xxxxxxxxxx>
>Subject: RE: A photographic tutorial of Pancake Coil winding...with
>    movies...(fwd)
>
>Hi Jeff,
>
>What you have here is a combination flat spiral and tall solenoid coil.
>Bart just pointed out that the metal pipe you are using acts like a
>waveguide, or third coil.  It would be more appropriate to call this a
>combination coil, rather than just a pancake coil.
>
>You should be able to change to quality of the spark output by changing the
>tube length.
>
>BTW, I like your winding technique with the roll of paper.  Have you
>considered using a roll of electrical tape?
>
>David W. Thomson  
>
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>