Topband: FairRite Products 2873000202

Tom Rauch w8ji at
Sat Feb 4 11:54:20 EST 2006

> I have been using no.27 enamel wire with only the
secondary within a teflon
> tube in the core. The primary is wound around the telfon
but clearly touches
> the  bare core -- are you saying this is not good?  Pete

You should avoid scratching through the enamel, especially
if the core contacts another conductor.

Normally enamel is not a problem, but at times if a single
layer of enamel is used it can be scratched through.
Actually you don't want to scratch the wire with ANY core.
The reason is pretty obvious, that bare spot might touch
another bare spot in a winding (which is worse than core
contact). Changing to 43 material does not totally solve the

73 Tom

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