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Topband: Teflon tubing in binocular ferrites

To: topband@contesting.com
Subject: Topband: Teflon tubing in binocular ferrites
From: kurt-erich.finger@arcor.de
Date: Wed, 17 Jan 2007 19:33:35 +0100 (CET)
List-post: <mailto:topband@contesting.com>
I read the intereting discussion about using binocular type ferrites for 
transformers in this reflector (Feb 2006). I understand that the wire should be 
in an additinal tube to avoid scratching the enamel from the wire. But why is 
teflon recommended  in receiving  transformers? Shouldn't PVC isolated wires do 
the job? If I put the wires in tube I increase the distance beween primary and 
secundary and thus reduce the capacity. Is this right? I have some small 
diameter tubes used in the chemical laborarory with a larger wall thcikness. I 
assume that they would decrease the capacity even more, or?

cheers

Kurt-Erich

PS
I read the discussion "What is a turn" in this reflector. A short remark. 
Binocular cores are on the market for at least  17 years. I have a brochure 
from Amidon where they defined what a turn is.  A round-trip.

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