Two Way Hourglass Bends on My KCS47

[Chris K]

Originally Posted by Kevin Kuehn

Over on the ARF there's a couple Australian engineers that swear on cooking transformer windings in mineral spirits to dissolve any wax. And while it's still hot dunk in marine grade polyurethane varnish. The theory goes the hot mineral spirits draw the vanish inside and replace the solvent as it evaporates. There's a write up of the process.

Last comment from me as I feel the "SEPARATE SUBJECT REQUIRED!" wrist slap is on its way!

I read several of them and they are fascinating. In addition, I'm a little apprehensive about the health and longevity of my TVs with a flyback winding exposed by cracking and/or melted wax. I have several Philco restorations that have that era of flyback and I have a designer, special edition Hallicrafters 7" that exhibits the heat related fading brightness symptom. I think I should probably get to them with some corona dope sooner rather than later.

I suppose the most efficient way to drag varnish into the windings is to match the base solvents as closely as possible.