Manufacture date of 6SN7s

henryp · 12th October 2006, 01:26 AM

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

Tom Bavis · 12th October 2006, 02:25 AM

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...

EC8010 · 12th October 2006, 07:30 AM

Is there anywhere that gives any clues as to what "Tube Lore" contains?

henryp · 14th October 2006, 12:53 AM

THANKS FOR THE INFO - I HAVE ORDERED A COPY.

PH

jlsem · 14th October 2006, 03:59 AM

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

henryp · 19th October 2006, 05:31 PM

"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

12th October 2006, 01:26 AM	#1
henryp diyAudio Member Join Date: Aug 2003 Location: Fredericksburg.Virginia	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

12th October 2006, 07:30 AM	#3
EC8010 diyAudio Moderator Emeritus Join Date: Jan 2003 Location: Near London. UK	Is there anywhere that gives any clues as to what "Tube Lore" contains? __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

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12th October 2006, 02:25 AM	#2
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	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...

14th October 2006, 12:53 AM	#4
henryp diyAudio Member Join Date: Aug 2003 Location: Fredericksburg.Virginia	THANKS FOR THE INFO - I HAVE ORDERED A COPY. PH

19th October 2006, 05:31 PM	#6
henryp diyAudio Member Join Date: Aug 2003 Location: Fredericksburg.Virginia	"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