RE: First light with new MMC PLEASE HELP!!

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Dave,

On 16 Sep 2002, at 17:01, Tesla list wrote:

> Original poster: "Dave Hartwick by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <ddhartwick-at-earthlink-dot-net>
> 
> Malcolm,
> I use that red wire. Is it no good? This stuff is made by Rea, and I believe
> is  nysol.
> 
> I've wound from 4" to 10" secs with varying gauges and have not had any
> problems.
> 
> Dave Hartwick

It just isn't as robust as the polyesterimide at elevated 
temperatures. I've also known it to start melting in some varnish 
solvents (esp if warmed), it is less immune to damage if knocked or 
subjected to friction, and it can't withstand the same voltages. For 
a lot of applications it does the job OK and would probably only be a 
concern in really high powered coils where voltage gradients could 
hit a kV/turn. Obviously it must be considered OK by some people for 
some things or it would simply vanish from the marketplace.

    I'd never consider using it in motors or transformers where 
heating and magnetostriction could be present. My main wire supplier 
won't stock it on principle. Convenience seemed to be the main 
concern of a firm I once asked to wind a transformer (the last I ever 
did ask to do it funnily enough). When I asked them why they used it 
in the 230V primary, they told me that "it's easier to solder the 
leads to". Since then, I've wound dozens without failure (unlike 
them).

Regards,
Malcolm