RE- Ferrite chokes & saturation - why toroids?

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: RE- Ferrite chokes & saturation - why toroids?
From: Tesla List <tesla-at-stic-dot-net>
Date: Sat, 29 Nov 1997 20:46:02 -0600
Approved: tesla-at-stic-dot-net

From: 	Alfred A. Skrocki[SMTP:alfred.skrocki-at-cybernetworking-dot-com]
Sent: 	Saturday, November 29, 1997 6:04 AM
To: 	Tesla List
Subject: 	RE- Ferrite chokes & saturation - why toroids?

On Friday, November 28, 1997 7:30 AM Chuck Curran
[SMTP:ccurran-at-execpc-dot-com] wrote;

> Alfred:
> 
> I do tend to agree with your comments since the toroids used on the HV side
> of my transformer were both hand wound very quickly and easily.  The winding
> was far easier than the effort required to put in place the inter-layer
> insulation!  I ended up with 180 turns or four layers of #20 wire on my
> wound toroids which are 2 1/2" O.D., 1 1/4" I.D. and 1" Thick.  I simply
> reached up into the basement rafters and pulled down some of that left over
> wood strips I had and cut off and notched about an eight inch length.  Here
> I pre-wound a calculated length of wire and went to it.  Quick and easy job.
> I simply used electricians tape for the interlayer insulation.

I know Chuck, I've wound many a transformer on toroid cores and as you said 
it goes quick and easy if you use a shuttle. The reason you had soo much 
difficulty with the inter-layer insulation was because it being electrical 
tape had one side sticky and getting stuck to everything! I usually use a 
polyethylene strip for inter-layer insulation and only use a small piece of 
tape to hold down the ends. I have also used cotton ribbon for inter-layer 
insulation and then dipped it in polyurethane and allowed it to set before
winding the next layer.

                               Sincerely

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                           Alfred A. Skrocki
                   Alfred.Skrocki-at-CyberNetworking-dot-com
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