The 6SN7 Identification Guide

[Oskari]

Pics are always nice. 

 

[MIKELAP]

  Thanks for the useful link so T = British Tungsram, Tottenham. I'll add pics if useful.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

 

[northendjazz]

 

 

 


Ok pics, I tried to see/photograph the getter? looks like two rods running side by side?

 

[whirlwind]

  The Marconi B65 is not always metal based.
They can be , but are also made with black plastic base.
Also with brown base and with smoked glass or clear glass.
manufactored in Britten Holland USA .
 
I have a few of these types )
They are in my opinion the best of the 6sn7 types
Koldby

I have a B36....same tube , 12 volt version of B65, at least i think.......very nice tube.
 

 

[CZ4A]

Did DuMont ever manufacture their own 6SN7? I know they sourced some from Tung-Sol and I've read elsewhere they never made any receiving tubes. However, going through my tube stash I found this DuMont 6SN7GTB with DuMont's EIA number, 158.

I've seen a black plate version of this tube that looks identical otherwise on eBay. My question is, who made it?

 

[Oskari]

My question is, who made it?

 
Not sure, but could be Toshiba.

 

[Oskari]

 

Ok pics, I tried to see/photograph the getter? looks like two rods running side by side?

 
Thanks! Your photos are impressive, doubly so considering the grey glass. The, assumably D, getter (holder), however, is not visible in your photos. It's hiding lower inside the bottle.

 

[CZ4A]

Not sure, but could be Toshiba.

Then DuMont were lying liars that lied, because it says "USA" twice on this tube! You can see "Made in USA" under the DuMont label in the first picture, and here again with some kind of manufacturing code.

EDIT: I figured it out after some Google Image searching- it's a rebranded Raytheon.

 

[Skylab]

That would make sense, because wasn't a lot of the Toshiba tooling directly copied from Raytheon (on purpose under Raytheon's supervision)?

 

[Oskari]

That would make sense, because wasn't a lot of the Toshiba tooling directly copied from Raytheon (on purpose under Raytheon's supervision)?

Hitachi was pretty close to Raytheon. Toshiba I don't know about.

 

[Oskari]

Then DuMont were lying liars that lied, because it says "USA" twice on this tube!

They wouldn't have been the first ones to do so.

 

[Makiah S]

So this is a pretty great thread! Very Resourcefull, but all the picture links are dead q.q 

 

[Digital Don]

I found this article very helpful in understanding 6SN7 tubes. Much appreciated. Don

 

[RoundRound]

Hello People,
Has anyone tried the Sylvania CHS JAN 6SN7WGTA? 66' - How does it sound?
 
I found a matched quad for $150 - not sure if it's a good deal? I want to use them in the Freya...
 
Thank you!

 

[ThurstonX]

Just started rolling 6SN7GTs in my Lyr, and have a question about the codes on the pair, below (6SN7GTAs).  The seller describes them as "angled plates," but I'm still trying to figure out all the different plate structures.  re: the codes, are they to be read vertically as two sets of numbers (my assumption), or horizontally as three sets of numbers?  Assuming vertically, "077" doesn't seem to refer to Sylvania, and I haven't any reference to it yet.  The "448" I'm guessing means the 48th week of 1954.  What about the "14B"(?) in the third photo?
 
They've only been going about 24 hours, but digging them so far.  Tighter bass than the KEN-RAD and 3-hole Sylvania "Bad Boy" 6SN7GTs I rolled previously, and those weren't bad.  Early days, though.
 
Thanks in advance for any info or insights.
 
 
Photos pulled from eBay listing