If this topic already exists somewhere, could someone please forward me a link to it? Thanks in advance!

Anyway, I'm sure many fans and collectors have at least one core/coil ballast that has over time disintegrated the glue thereby causing one or both windings to come loose and vibrate noisily during operation. As I'm sure many would also say, they are old forms of Mercury ballasts that have been fabricated for a specific fixture with mounting brackets welded to it. The internet so far has been no help in enlightening any specialized transformer services that will actually repair these transformers. All they think I'm looking for is general average household electrical services (big help ) Where can I take them to get repaired and if not, what heat resistant glue is the best to use to resecure that loose winding? Also can they replace plastic that had broken from being baked dry and brittle?

Don't forget often the buzz/hum does not come from the ballast itself, but from the loose or too flexible nearby steel parts, attracted by the leaked magnetic field from the ballast. So tightening all lose fixture parts and/or stiffening the larger metal sheets (so they won't vibrate) around the ballast often solves the problem...