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Help me.......What is the 6SN7 ???????

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cd149dc

cd149dc

Member
Joined 2006
natubes.com/
Hello,

Anyone could tell me what version of 6SN7 tube.

Thank you so much,

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.
 
J

Johan Potgieter

Member
Joined 2005
Ditto here.

Geometry looks like classic 6SN7 (have a normal one here), with anode surface somewhat larger. I guess that it is somehow a higher anode dissipation type, or designed to work in very hot areas plus perhaps conditions of vibration/shock.

Cd149dc, can you tell us where you found it or any more information? Most interested.
 
I

ilimzn

Member
Joined 2005
East German military 6SN7 (often has both US and russian markings) made by WF. I have a couple of those with the original labeling intact, it comes above the 6SN7 mark on yours. I'm not sure the elements are ceramic, but rather something like compressed mica. Still, they work very well...
 
Brian Beck

Brian Beck

Member
Joined 2004
Very interesting tube. I've collected a lot of different 6SN7s, but I've never seen one like that. The ceramic support wafers have that "Red Bank" appeal.

As Johan suggests, the larger radiator fins coming off both sides of the plates ought to give a larger plate dissipation rating, all else being equal.

Ilimzn or cd149dc, do either of you have the East German part number, and the data sheet associated with it? I'm curious about how similar this tube is to a regular 6SN7.
 
E

Eli Duttman

Member
Joined 2004
Brian Beck said:
Jacco's linked photo shows dual markings: 6H8C and 6SN7. The data sheet for the 6H8C suggests a near equivalent to the 6SN7. Max plate voltage and dissipation ratings are lower, surprisingly. Whether the 6H8C shares the fabled linearity of the 6SN7, I can't say.

6H8C data sheet
Click to expand...


The ratings may, in fact, be a non-issue. Look at the 6SN7GT data sheet. Notice that the dissipation limit is 2.5 W./section, when both sections are operating.

A 1930s vintage 6SN7 is not as tough as a 1950s vintage 6SN7GTB. For audio purposes, the difference is not important.
 
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