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question for Joe S


Joe S :
in your famous 'tube lore' document of 9 or 10 years ago you in your extensive coverage of the 5751 variety ~ made reference to the Sylvania black plate triple mica steel pins as possible being short lived compared to their gold pinned gray plated brothers ...you mentioned you would report back on that later ...I have been unable to find any follow ups
can you tell me what you have discerned ?
thanks Bernard


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Topic - question for Joe S - bernard991 12:52:45 03/01/07 (7)


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