Re: Unpot ++

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: FIFTYGUY@xxxxxxx 

In a message dated 11/29/05 2:48:30 PM Eastern Standard Time, 
tesla@xxxxxxxxxx writes:

> The Jefferson does not appear to have shunts that I could remove. Is
> any one on the list familiar with the inside of a Jefferson?

    Yeah. I've got a Jefferson 15/30 that was part of a 15/120 farm 
I used for TC'ing 16 years ago. Seemed to survive just fine, despite 
the abuse it suffered. Then I pulled it out of storage last year to 
run a Jacob's ladder, and it died within the first two minutes. :(
    Now one side has zero output. Despite my unpotting it, poking 
around, measurement, and careful observation under power, I still 
can't figure out why.
    At the time, I noticed the construction you are talking about. 
The shunting is part of the lamination design, and yes, would require 
some sort of weld breaking followed by milling/grinding to remove.
    Perhaps you could drill holes through the lamination stack? 
Drilling through transformer iron is not *too* bad, if you use sharp 
bits and a steady fixture.
    I never did like Jefferson transformers of any type.

-Phil LaBudde