Re: To cut or not to cut

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 8/8/01 1:58:34 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes:

> Original poster: "Basura, Brian by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
<
> brian.basura-at-unistudios-dot-com>
>  
>  (un)Terry,
>  
>  Something sounds wrong. I run a 1256D as a variable inductor and it handles
>  40-amps without any problem (after I swapped out the 30-amp fuse that 
is)...
>  
>  Regards,
>  Brian B.

Brian, (un)Terry, all,

I suspect that some folks have good results with un-cut
variacs and other do not because of the overall coil design.
If the transformer and cap value is such that a large 
ballast inductance is needed, this will permit more turns
of the variac to be used, and saturation problems are less
likely.  I also suspect that folks who are able to use about
50% of the variac winding for normal TC operation will have
no problems, but folks who use only about 20% of the
variac winding will have problems.  The breakrate of the
coil might have some effect too on all this (maybe).

John Freau