Paul and all,
Each to his own, but I prefer to thread the wire through from the end.
Using a hook requires the wire to flex sharply at all points as you pull it
through on each turn and can result in work hardening of the copper. That
will not make any difference electrically, but can cause the wire to break
while you are winding the toroid, and you have to start over again - and I
find that most frustrating.
When there are many turns on the toroid, I start in the middle of the wire
so I don't have to deal with threading a very long wire through the core -
wind half the number of turns, then flip it over and continue with the other
loose end.
Most important - count carefully, it is the turns through the middle that
are important, and if one counts the turns on the outside you can be off by
one turn. When you first pass a wire through the toroid core, you then have
a 1 turn winding - think about it that way.
73,
Don W3FPR
----- Original Message -----
Since I read an article in "Hints and Kinks" (I think) on using a hook to
pull the wire through the toroid I've always used a crochet hook (that may
need translating into American) from my XYL's selection. You need to use a
metal one, the hook pulls off if you use a plastic one, but they are
nicely
rounded so they don't damage the enamel. It makes winding neat toroids
much
more straightforward then trying to "push" the end of the wire through the
hole.
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