The 6SN7 Identification Guide
Sep 16, 2019 at 10:20 AM Post #196 of 529
Sep 16, 2019 at 10:37 AM Post #197 of 529
Yep! That is quite a bit more than I paid for mine. They can be found for around $200 a pair, or $100 to $150 a single, and are worth every penny.
I'd grab one real quick for $100.. seen them go for $200 last time searching for that tube. Great reviews on it.
 
Sep 27, 2019 at 1:31 PM Post #200 of 529
Nov 5, 2019 at 10:57 PM Post #202 of 529
Nov 5, 2019 at 11:02 PM Post #203 of 529
Nov 15, 2019 at 12:50 PM Post #205 of 529
6fAZyEw.jpg


Fotons from left to right: ‘52, ‘56, ‘65

early ‘50s have a metal tab in the bottom mica and the plates are ribbed.

late ‘50s no tab, still ribbed plates.

‘60s have smooth plates.

after the sixties, there are no top mica supports.
 
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Nov 15, 2019 at 1:01 PM Post #206 of 529
6fAZyEw.jpg


Fotons from left to right: ‘52, ‘56, ‘65

early ‘50s have a metal tab in the bottom mica and the plates are ribbed.

late ‘50s no tab, still ribbed plates.

‘60s have smooth plates.

after the sixties, there are no top mica supports.

Sound impressions? I'm looking for other options for my tube phono preamp that uses a 6SN7 as a cathode follower in the circuit. Thank you.
 
Nov 16, 2019 at 2:00 AM Post #207 of 529
Sound impressions? I'm looking for other options for my tube phono preamp that uses a 6SN7 as a cathode follower in the circuit. Thank you.

They are very good for the price, the sound is lively with good detail and slam from a Lyr 3. The early ‘50s sound almost the same, while the ‘60s loose some of that slam and clarity.
 
Nov 16, 2019 at 11:39 AM Post #208 of 529
6fAZyEw.jpg


Fotons from left to right: ‘52, ‘56, ‘65

early ‘50s have a metal tab in the bottom mica and the plates are ribbed.

late ‘50s no tab, still ribbed plates.

‘60s have smooth plates.

after the sixties, there are no top mica supports.

'56 was the last year of the ribbed plate. Starting in '57, the plates went smooth. To my ears, any of the '50's are noticeably better than anything from the '60's or later. Most of them need to have the pins resoldered though...
 
Apr 20, 2020 at 6:59 PM Post #209 of 529
Looking for some help identifying what exactly I have here.

The text on the base says GE for CGE. I've done a little bit of research and believe that CGE is Canadian General Electric. But not sure.

The tubes are tall, plates are dark grey, maybe even black depending on the lights. Plates are large and they seem to have copper rods running through. Maybe acting for support?

Markings on the bottle say 6SN7GTB

Any and all help would be greatly appreciated. Thank you.

20200419_141840.jpg
20200419_141834.jpg
20200419_141822.jpg
 
Apr 20, 2020 at 8:31 PM Post #210 of 529
Looking for some help identifying what exactly I have here.

The text on the base says GE for CGE. I've done a little bit of research and believe that CGE is Canadian General Electric. But not sure.

The tubes are tall, plates are dark grey, maybe even black depending on the lights. Plates are large and they seem to have copper rods running through. Maybe acting for support?

Markings on the bottle say 6SN7GTB

Any and all help would be greatly appreciated. Thank you.

20200419_141840.jpg20200419_141834.jpg20200419_141822.jpg

The lack of etched dots in the glass means it likely (but not positively) wasn't made by GE, which is fortunate. :) Here's the closest thing I have to it. Many similarities, although there are more (and longer) spikes on the mica ends with your tube:

Raytheon 2.jpg

Raytheon.jpg
:
 

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