73 material is conductive. The holes are lined with insulation to prevent
the enamel coating on magnet wire from scraping off and shorting to the
core as it is being pulled through the holes.
Also, it is easier to get more turns in a winding using Teflon wire vs.
some other types. The latest edition of Low Band Dxing by ON4UN goes into
more detail about this.
73, Mike
www.w0btu.com
On Apr 28, 2017 8:14 AM, "P H via Topband" <topband@contesting.com> wrote:
I've noticed use of teflon tubing in a Flag family transformers.
Apart from low losses: is there another reason to use teflon coated wires?
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