The 6SN7 Identification Guide
Jun 15, 2017 at 2:22 AM Post #136 of 529
Oh OK. the 4-52, looked like GE or maybe one of RCA's fonts. Have had them with all of those labels. SRL relabeled a lot of Tung Sol
T plate variety and also Raytheon.
Looks like a nice buy on a good used pair. They look pretty nice from the pics.

Thanks! If you do your homework sometimes you get rewarded with a great deal! I really wasn't looking to buy any more tubes for a while unless you had some of those Raytheon VT-231 tubes we talked about earlier. When I put my bid in with 10 seconds left it was under $100. Another bidder put in the same max amount I did after I did so I won.
 
Jun 15, 2017 at 5:19 AM Post #137 of 529
Jun 15, 2017 at 9:17 PM Post #139 of 529

Yeah, those tubes are not "Bad Boys". No Sylvania 6SN7GTA is a "Bad Boy" and certainly no short bottle tube can be....
 
Jun 15, 2017 at 10:02 PM Post #140 of 529
Very sad. Anything to make a sale. what's scary is, it's a combination of BS
and ignorance out there. There are SOME good tube dealers on ebay, but there are people who sell
TONS of tubes who really have no idea or are
full of it. Of course I'm completely biased, so don't listen to me :) (Oh and shameless plug, those are actually nice sounding tubes, but I sell them for $50 pair)
 
Jun 22, 2017 at 12:28 AM Post #141 of 529
Does any know how to decode the date codes on Raytheon VT-231 tubes? I have 3 that have "CE5" and 1 that has "1E5" or "IE5".

Thanks!
 
Jun 23, 2017 at 4:02 AM Post #142 of 529
Does any know how to decode the date codes on Raytheon VT-231 tubes? I have 3 that have "CE5" and 1 that has "1E5" or "IE5".

Thanks!

Anyone? If not, does anyone have a suggestion on who might know?
 
Jun 23, 2017 at 2:26 PM Post #144 of 529
It's almost assuredly 1945.
Probably March and September.
6SN7GT's were labeled VT-231 mainly from 43-45.

Thanks! So the "C" or "I" is the month and the "5" is the year. What is the "E"?
 
Jun 23, 2017 at 3:47 PM Post #145 of 529
Unsure. I think many or most had the E though. Never paid much attention to the Raytheon codes.
Probably because they're less common tubes in the 231 stratosphere and they seemed to have been made later. I never thought about it until now and could be wrong but it seems as if they may have been the last major outfit to start making 6sn's.
I don't recall seeing any with codes before 43.
and I think 44 & 45 is usually what I see.
 
Jun 25, 2017 at 2:15 PM Post #147 of 529
Jun 25, 2017 at 4:06 PM Post #149 of 529
Regardless of what that site says and what Brent Jesse says, there are no such things as 2 hole "Bad Boys".

Look in this the first post of this thread:

https://www.head-fi.org/f/threads/the-reference-6sn7-thread.117677/

Find the section that starts with:

Sylvania 6SN7GT (1952 vintage ONLY)

Only someone that wants to sell you something would say they are the same. Well, someone that is ignorant of the facts might say they are the same too.
 

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