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4cx250b tube

K

kswitchdr

Guest
Is there any way to test one of these to see if it is good or weak ? Also if a new one has been on the shelf for a long time could it go bad ? Thanks alot,Mike.


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Is there any way to test one of these to see if it is good or weak ? Also if a new one has been on the shelf for a long time could it go bad ? Thanks alot,Mike.


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Paws - what does this signify?:



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