Note that there is enameled wire that can't be stripped this way. The
enamel is heat-resistant. Of course if you are using the wire that comes
with Elecraft kits, you shouldn't have this problem.
What I do is put a blob of solder on the tip of the iron. Then, I hole
the END of the wire, which of course has no enamel on it, against the
tip. That transmits heat into the copper, starting the process. Then I
pass the wire through the blob slowly and watch the enamel boil off.
Afterwards I scrape lightly with a knife to remove flux and burned enamel.
This works fine with the iron set to 750 degrees f. If you aren't
succeeding with an iron even hotter, I would suspect that you have the
wrong kind of enameled wire.
Incidentally, I use a second iron with an old tip for this. Having the
blob of solder with flux boiling on it for a long time tends to erode
the tip.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 12/06/2020 17:02, Robert G Strickland via Elecraft wrote:
Here's an old problem that I've never solved: how to strip the enamel
insulation from wires for winding toroids.
The instruction say:
-dip in a solder pot which I don't have
-use a soldering iron to, presumably, burn the insulation off which has
never worked for me.
Leaving soldering pots aside, the hot iron approach has never burned off
any insulation even with tip temp's hovering around 1000F. Just doesn't
happen. Maybe it's the soldering iron, maybe my method, but whichever,
the enamel insulation just sits there. I end up using a file to scrape
off the insulation which is tough on the wires and hard to predict when
enough is enough. Any insightful hints? Thanks much.
...robert
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