Paul-
take a look at the date code, btw the filter I found used is a Schaffner FN685-16-06 it is 16A date code 9826, cost me $5 from weird stuff ( no longer in existence), back then figured $5...hmmm take a chance, it was in a bin and pretty well tossed around. It is potted so It is going to take a lot to break it. I only worried about transient issues that may have damaged it......
Renée, K6FSB

On 1/12/25 2:02 AM, Paul N1BUG FN55mf wrote:

Does anyone have thoughts on possible risks of buying new, old stock AC
line filters on eBay? I am tempted as I see some good deals but I wonder
about aging of high value capacitors (1.5 uF, .47 uF). I also wonder
about possible damage from dropping or sudden impact since they probably
use ferrite for high value inductors (47 mH). These filters that have
good performance at LF and into VLF are very different in terms of parts
values, size and weight from the ones I have experience with at HF, VHF
and UHF frequencies. The more I think about it, the more I think paying
almost twice as much at Digi-Key or Mouser is probably wise.

73,
Paul N1BUG
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