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Re: Would this work? (air gap in ballast core)

Original poster: Ed Phillips <evp@xxxxxxxxxxx>

You certainly need an air gap, but don't be so sure that those
laminations will fly apart if you cut the bonding strap.  All of the C
cores I've seen have the laminations varnished together, with the faces
ground and polished for good fit.  They come in two separate pieces.