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[QUOTE=On the subject of phosphors, I've had the unpleasant experience of discovering the non-aluminized black & white tube phosphor the easiest to damage if you suddenly break the seal off nipple at the base of the gun. You can blow away a circular patch of phosphor several inches in diameter off the face plate.>>>
Probably is a way to do it by putting some flexible filter or device over the nipple so when it is broken, the air has to go thru the filter or something like that to slow down the de-vacuuming of the tube (?) Maybe just a little rubber hose slipped over the nipple with a filter or pinhole plugged into the other end of the hose.
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