Re: First light with new MMC PLEASE HELP!!

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Tesla729-at-cs-dot-com>

In a message dated 9/16/02 4:09:02 PM Pacific Daylight Time, tesla-at-pupman-dot-com
writes: 
>
> There is no doubt that it is a shorted turn!! This is quite strange. I 
> have wound two secondaries for this coil on separate peices of PVC. The 
> first used 0.95mm wire, and the second used 1mm wire. Both have failed 
> in much the same place. I meticulously sand, clean and coat the coil 
> before and after winding. I'm wondering if the extra current at the 
> base of the coil is warming the wire to a degree that causes premature 
> failure of the insulation??
>
>
>
>
> Cheers,
>
>
> Greg Peters.
>
>



Greg,

I had the same problem with my large coil and I had to remove
the wire from that point down and decrease the coupling K. Once
I did this, the problem went away, so maybe try loosening the
primary/secondary coupling. In my case, it seemed to be more
a function of overvoltage between the turns than overcurrent in 
the secondary wire itself.

Coiling in Memphis,
David Rieben