"Phil (VA3UX)" <phil@vaxxine.com> mentions a very good point --
>5) Because it will be out of oil, the transformer should be used indoors in
>a dry location. Might sound obvious but some people have mounted big power
>supplies or big mono-band amplifiers in their garages. These transformers
>have no protection against moisture ingress once they are out of oil and a
>garage is subject to greater swings in temperature and humidity than a
>house. Indoors they seem to run for ever without a problem.
And it goes without saying that if you rewind, it's trivial to clean the
laminations before reassembly, and you can seal them (glyptol, varnish, or
pigment-free lacquer) or pot them in epoxy or polyester. But if you don't
disassemble and clean, potting is not going to work.
At least, I've never found a paint that would adhere to oily metal.
Jim N6OTQ
lookin' for a transformer to rewind!
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