> Original Poster: Reinier Heeres <rwh-at-worldonline.nl>
> Hi all!
> I just found some pretty cheap copper wire to build my first tesla coil.
> It is normal 0.6mm dia (AWG 24 I think) wire, but it has an extra red
> coating. The guy who sold it to me told me it was something they called
> 'baking varnish'. When they finish winding a motor they apply a high DC
> current, so that the wire heats up and melts together. Could anyone tell
> me if what it is? Is it lossy at TC frequencies, etc.
> Regards, Reinier
It is self-fluxing wire. It has no substantial
temperature rating, resists wear poorly (as in motor windings rubbed
together by magnetostriction) and can melt in varnish solvents at an
elevated temperature. It should be fine for a coil (especially a
space wound one) as long as a room temperature air drying varnish is
used (if one is used at all). It is a most unwise choice for motor
windings. The people I purchase wire from here (Electropar) won't
stock it on principle.