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Re: Unpot ++



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