Re: How to wind a simple Pancake Coil in less than an hour... (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 25 Jun 2007 13:12:48 -0300
From: Antonio Carlos M. de Queiroz <acmdq@xxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: How to  wind a simple Pancake Coil in less than an hour... (fwd)

Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Mon, 25 Jun 2007 02:49:24 +0000
> From: Jeff Behary <jeff_behary@xxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: How to  wind a simple Pancake Coil in less than an hour...
>
> Hello,
>
> Here is a real basic flat spiral type Pancake Coil that anyone can build 
> mainly from materials found locally.
> http://www.electrotherapymuseum.com/2007/Lesson2/index.htm
>
> It uses some magnet wire (Ebay), cash-register paper (Office Depot) tossed 
> in oil (Home Depot), a silicone cake pan for a mold (Target), some paraffin 
> wax (Grocery Store or Craft Store).  The rest are plastic disks - which can 
> be as simple as phonograph records, some bolts, a piece of teflon or 
> plastic, etc.
>
>   
Very interesting. I am not following the thread in detail, and was a bit 
surprised (although this makes sense)
seeing that the coil is just a flat single layer coil. Have you tried to 
put more than one turn per layer, or saw
old coils using more than one turn per layer? There is the obvious 
insulation problem, but maybe two or
three turns per layer don't add excessive stress.

Antonio Carlos M. de Queiroz