Manufacture date of 6SN7s - diyAudio
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Old 12th October 2006, 01:26 AM   #1
henryp is offline henryp  United States
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Default manufacture date of 6sn7's

I have recently aquired a box of old 6sn7's g, gt, gta, gtb and have no way to figure out the manufacture dates. A couple of examples: ge ff 188-5 and raytheon 280 2-17. Is there anyway to decipher these numbers - is a reference book that covers this available? Thanks in advance for any help.

ph
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Old 12th October 2006, 02:25 AM   #2
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THE book is "Tube Lore". You can buy it from the author directly: here

188-5 means GE, Kentucky plant. 2-17 might mean 1952, week 17. or 1962...
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Old 12th October 2006, 07:30 AM   #3
EC8010 is offline EC8010  United Kingdom
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Is there anywhere that gives any clues as to what "Tube Lore" contains?
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Old 14th October 2006, 12:53 AM   #4
henryp is offline henryp  United States
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THANKS FOR THE INFO - I HAVE ORDERED A COPY.

PH
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Old 14th October 2006, 03:59 AM   #5
jlsem is offline jlsem  United States
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Quote:
Is there anywhere that gives any clues as to what "Tube Lore" contains?
It's basically the last word in trivia about many tube types, mostly American. Well worth the money.

John
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Old 19th October 2006, 05:31 PM   #6
henryp is offline henryp  United States
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"TUBE LORE" arrived yesterday and is proving to be invaluable.
Also received a copy of "WESTERN ELECTRIC TUBE DATA" which is a great ref if you are into Weco types. Both came from AUDIOXPRESS.

PH
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