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damaged collins filter?
I have a new in the original box F455N20 collins filter
(from R390A) that I got at a hamfest many years ago and stored it away for a 'future project'. I dug it out recently and was examining it when I noticed that as I rotated it in my hand I could feel something inside shifting back and forth. I never noticed this before (the filter was NEVER dropped in my care and has remained packed in the original packing material all this time). Is this normal for this type of filter or might the unit be defective? |
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