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Schaffner FN9223 mains filter - good or bad?
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srb1954:
I am looking at the Schaffner FN9223-3-06 mains filter in my newly acquired 3458A and I am wondering whether it is prone to the dramatic magic smoke release of earlier Schaffner mains filters and needs immediate replacement. I am reluctant to replace it if it is not necessary as the filter is riveted into the cabinet and there is limited working space around it.

The build date of my 3458A is around 2005 and the filter date code appears to be 0432. Did Schaffner manage to finally sort out their exploding problems and produce a reliable mains filter by 2004?
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