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Re: 3458A Schaffner Mains Filter


 

"Carsten Bormann" <cabocabo@...> writes:

But if you need to replace them, getting a new line filter is a bit less of a waste of time.
If you try to repair the line filter: Definitely do *not* get a replacement cap that is again a clear blob of hard epoxy; these will fail the same way some 20, 30 years from now. Best get one with a plastic cup and some more ductile plastic filling covering the capacitor coil.
Kemet still sells metallized paper (MP) caps that appear to use the same
epoxy coating. Do we know that modern Schaffner filters have opted for
the film caps over the MP versions? Has anyone opened these up?

Also, how simple is it to open up the line filter and just replace the
caps?

Matt

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