Recent content by circatubes
  1. C

    The 6SN7 Identification Guide

    Well, I guess you'd really have to check with the Bad Boy Police to see if you were in compliance :-) Yes, 1950. If you read the post I wrote on AAsylum, I mentioned copper grid posts. The 1950 3 hole blackplate tube is a rare run, that seldom shows up, have had maybe 3-4 out of 100+ of the...
  2. C

    The 6SN7 Identification Guide

    Looks like exactly what it says on the label. B5 indicates 1945.
  3. C

    The 6SN7 Identification Guide

    From a few years back: https://db.audioasylum.com/mhtml/m.html?forum=tubes&n=256992&highlight=decola&search_url=%2Fcgi%2Fsearch.mpl%3Fforum%3DALL%26searchtext%3Dsherwood%2Bs-7100a&r=
  4. C

    The 6SN7 Identification Guide

    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...
  5. C

    The 6SN7 Identification Guide

    It's almost assuredly 1945. Probably March and September. 6SN7GT's were labeled VT-231 mainly from 43-45.
  6. C

    The 6SN7 Identification Guide

    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...
  7. C

    The 6SN7 Identification Guide

    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.
  8. C

    The 6SN7 Identification Guide

    Yes, one was relabeled by RCA or GE looks like. Has 52' glass code.
  9. C

    The 6SN7 Identification Guide

    Also, Raytheon GT/231 with "boxy" rectang plates , Raytheon T plate GT (sim to Sylvania GT) and CBS Hytron GT.
  10. C

    The 6SN7 Identification Guide

    My favorite 6SN7's to listen to have been the Sylvania's: Bad Boy 3 -hole plate, 2 hole GT/231 black and grey plates, 6SN7W all versions. Tung Sol round plate and GTB. Have found Ken Rad and RCA to be good in systems that veer towards overly analytical.
  11. C

    The 6SN7 Identification Guide

    Wanted to share my opinion on the 5692's in general. I can't say I've listened critically to the CBS,but having listened to the GE/RCA extensively over the years, they are not in my opinion, great sounding 6SN7 tubes, perhaps good in some systems. The experiences of my friends and customers who...
  12. C

    The 6SN7 Identification Guide

    Yes,if you see them for a good price, grab em!
  13. C

    The 6SN7 Identification Guide

    Yes, have had many Tel-rad brown base tri black plate, WGT*, all Tung-Sol
  14. C

    The 6SN7 Identification Guide

    Just a labeled for the military 6sl7gt, prob 1941-45.
  15. C

    The 6SN7 Identification Guide

    Nice post, To add, There was actually a scarce run of Bad Boys in 50'. black plates. Also grey plate 3- hole Bad Boys in 51' and maybe 52' if I remember correctly. I also have a tube with one 2-hole plate and one 3-hole plate, think 51' will check.
See more
Back
Top