Re: solderig enamelled wire, problems.

On Tue, 24 Jun 2025 22:41:20 +0200, Lasse Langwadt <llc@fonz.dk>
wrote:
 

On 6/23/25 12:21, albert@spenarnc.xs4all.nl wrote:

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.
>
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.)
>
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.
>

>
are you sure it is copper and not copper coated aluminium?

 Wouldn't the aluminum reveal itself by melting?