Rewaxing a Flyback

[Findm-Keepm]

Originally Posted by Phil Nelson

I had wondered the same thing. Since wax hasn't stood the test of time, why not use some more modern material? Nobody coats flybacks with wax nowadays.

I once re-coated a flyback with RTV, and in that discussion Eric H. suggested this stuff as a better material, since the thin liquid can seep down into windings:

http://www.aervoe.com/paints_coating...y-Coating.html

That epoxy coating would work only if the flyback was virgin, as in no wax already coating it. It's tough getting anything to stick to wax. Perhaps one could somehow displace the wax with it, but how?

I've yet to see any coating except RTV3145 stick to a flyback saturated with wax. Conrac RGB monitors in Grumman Aerospace used a clear, solid plastic donut clamped around the flyback secondary, probably for moisture proofing or corona prevention. Later models used a potted approach, much like GE started doing with the MA/MB color chassis flybacks. They used a solid plastic shell, with the primary and secondary laid in some funky green potting material. Philco/Sylvania flybacks in the 80's used a similar approach.

Cheers,