Re: solderig enamelled wire, problems.

I remember soldering coil/transformer wire was simple in the 70's.
The trick was putting the wire an aspirin tablet and 0.1 mm was no
sweat.
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Now for the 1v-5v step up converter I followed the advice, and remove
the winding of a 5x5 mm ferrite coil and replaced it with a bifilar
wire with the same number of turns. This was surprisingly easy.
.35 mm wire with 2*.25 wire. (The wire was stolen from a broken
ventilator.)
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Now I get stuck. I can't solder the wire! The aspirine trick doesn't
work. Burning the insulation turn it into a black coating that
is equally tenacious. Making the copper redhot to burn the coal,
only make the copper to melt.
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Groetjes Albert