[Skylab]

The STC logo does appear.

Y = brown low loss 'micanol' base.


As regards Brimar, I'd call them a manufacturer. A question of definition I guess.

Interesting...but weren't there Mullard made tubes that were branded Brimar?

I may be wrong but I thought that only the US used the designation of 6SN7. 

That's true EXCEPT for Brimar...that was the whole point of the "British Made American Radio tubes" thing

 

[gibosi]

And also, Philips manufactured the 6SN7 and the 12SN7 in their Eindhoven and Brussels (Mazda) factories. For example, here is a pair of Philips 6SN7 manufactured in Brussels and rebranded as Pope.
 
The Philips production codes on these tubes are r91 - L6K and r92 - L7F.
 
http://www.ebay.com/itm/matched-pair-6SN7GT-from-philips-miniwatt-NOS-/301715609163

 

[Oskari]

Interesting...but weren't there Mullard made tubes that were branded Brimar?

 
Obviously not 6SN7GTs!

 

[Oskari]

  I may be wrong but I thought that only the US used the designation of 6SN7. 

 
There are numerous counterexamples in this thread.

 

[Skylab]

Obviously not 6SN7GTs!

Ha!! Very true

 

[Mechans1]

Just to addd to the confusion, "Brimar 6SN7s" were madefor export in Australia they have clear glass and black glass.  The plates were bowed out slightly giving the plate structure a somewhat Ovoid (sort of oval) appearance.  I will have to root around in my 6SN7 collection to find you an example. 
As for the current discussion I have dark grey and black glass versions of the 6SN7 GTY CV 1988 no consumer tubes in my collection, not counting the ones I just wrote about  Aussie, have brown bases. 
In terms of sound quality there is simply no contest in my mind that clear glass is an inferior tube, but that is that they have been measured against the GTYs which I like a great deal.  It is a decent tube but nothing special.
As for European 6SN7s I have only the Brimar CV1988 GTYs and both ECC32s and 33s by Mullard.
There is no point for me to switch to the precursor,  top cap electrode tube  6F8G, now that I have assembled a fairly comprehensive collection of high quality 6SN7s.  .... Not to mention quite a few ordinary ones as well.
p.s.  I have seen the STC logo , and it does indeed look like that, but I too have never seen it on a tube

 

[Oskari]

 

  p.s.  I have seen the STC logo , and it does indeed look like that, but I too have never seen it on a tube

 
It did happen:
 

1. https://www.google.com/search?tbm=isch&q=site:r-type.org+stc
2. https://www.google.com/search?tbm=isch&q=site:tubecollector.org+stc

 

[DecentLevi]

Hi guys, I thought I'd share with you my recent discoveries after trying a bunch more 6SN7's
http://www.head-fi.org/t/702826/project-ember-tube-rolling/795#post_11867379

 

[bretemm]

I have the Schiit Valhalla2 with the stock tubes,
I mainly listen to indie rock and Classic rock,
What would be a good some tubes to try next? (Possibly one that would go well with the greatful dead?)

 

[Skylab]

The Valhala2 does not use the 6SN7 tube (which is the topic of this thread).

 

[bretemm]

Ok, the tubes 6DJ8/6922/ECC88/ECC85/6BZ7
Are what I can use, I thought those might actually of fit in,
But ingeneral with the ones I mentioned,
Which should sound good with the greatful dead?
Thanks, I'm starting to get into tubes now

The Valhala2 does not use the 6SN7 tube (which is the topic of this thread).

 

[gibosi]

Ok, the tubes 6DJ8/6922/ECC88/ECC85/6BZ7
Are what I can use, I thought those might actually of fit in,
But ingeneral with the ones I mentioned,
Which should sound good with the greatful dead?
Thanks, I'm starting to get into tubes now

 
As Skylab pointed out, this forum is for the discussion of 6SN7. This is not the place to find the answers to your question. I would suggest you visit the Schitt Valhalla2 thread and the Schitt Lyr threads, both the old one and the current one. There you will find folks with similar equipment and much experience rolling these tubes.
 
Cheers

 

[bretemm]

Thank you,
I thought I reconized that tube number as one that would work or if somehow that was related to one I mentioned (I'm just getting started with tubes)
Thanks

As Skylab pointed out, this forum is for the discussion of 6SN7. This is not the place to find the answers to your question. I would suggest you visit the Schitt Valhalla2 thread and the Schitt Lyr threads, both the old one and the current one. There you will find folks with similar equipment and much experience rolling these tubes.

Cheers

 

[magiccabbage]

hey guys just wondering what would be considered the better tube between these 2 - pair RCA 6SN7GTB - pair KEN RAD VT-231 
Would it be worth buying both? 

 

[Simon Templar]

Definitely the KenRads.  
 
If you truly have found a pair of NOS KenRads....I'm sure the price is impressive.  Be careful about that, though.  There are a LOT of tubes out there claimed to be NOS....but aren;t even close.  Some I've run across are compleatly worn out.  Sellers hope you don't have a tube tester to verify their claims with.  Even then....you can get taken if you're not careful.
 
 
 
....sT