Re: weird nst

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

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
 >
 > Original poster: "Andy Cobaugh by way of Terry Fritz 
<twftesla-at-qwest-dot-net>" <kb3ewy-at-rcn-dot-com>
 >
 > That looks like the Jefferson 12/30 that I depotted.  The core has to slide
 > out.  Well, slide is an understatement.  It took probably two hours with a
 > hammer and screwdriver to drive the core apart.  Even then, I had to grind
 > the core to make it fit back together because all the pounding spread and
 > deformed the laminations.

Hummm. A NST that I mentioned some weeks ago, that was not working well,
has also a Jefferson label and is constructed in that way, although
with just two windings. There is really a partial short somewhere.
The input current with the secondary open is too high (~0.9 A), and
changes just a little (~1 A) if I shorten the secondary. The secondary
gets hotter, so I think that the problem is there. I would have to
rewind the secondary, but for this I have to open that core.
A practical suggestion of how, with only minor destruction, would be
welcome.

Antonio Carlos M. de Queiroz