Russian tubes - Classification of various brands?

[ChuckT]

Book describes multiple phantom factories under same name in Soviet Union. So did the Ukraine (=ussr) factory exist ? Book also describes no further investigation of all these phantom factories took place. That probably means the phantom factories still are listed as factories.

The Oktyabr plant's 6n3p-dr is different to the Reflecktor which has 3 mica spacer. I have also seem a photo where Oktyabr 6n3p-i has 4 mica spacer.

 

[BillWojo]

This post should be placed at the top. Contains a lot of very good info. Going to get lost downwards after awhile.

BillWojo

 

[AndreyB]

Hello, I shoot some my Russian tubes and try to find some info concerning different Quality Signs on Russian tubes like "OTK", "<>" (rhombus) "ВП":
As I know:
"OTK" - sign of QC department, means that standard quality control passed. In the Soviet times ANY PRODUCT of ANY factory or other production MUST BE checked by "OTK" department - it was guaranty to civil buyers/users that this device is good and safe for use. It is "civil" sign.

"<>" empty rhombus or rhombus with only digits inside (since last '60-s - till present), also letters "ВП" and some two digits between them and inside rhombus - like "<В 171 П>" (before last '60-s) means that device passed Military quality control .
As I can find, digits inside rhombus does not mean any special concerning tube parameters - it's just personal provisory number of person who control QC process for military.

Rhombus signs also used and uses now for any other electronic components and devices which pass QC for military uses.

Sign like star and "CCCP" inside pentagone - is "Sign of Highest Quality USSR" - civil sign.
Words "Сделано в СССР" - means "Made in USSR".

Please feel free to ask any questions or find something special from ex-USSR 🙂

Here is some pics of my tubes:

 

[merlin el mago]

Many thanks Oleg.

 

[AndreyB]

Many thanks Oleg.

Hello! My name is Andrey 😀
Glad to help!

 

[merlin el mago]

E (russian E) - long life (5000h and more)
D (russian Д) - ultra long life (10000h and more)
V (russian B) - vibration proof, high reliability
I (russian И) - for impuls mode (high emission of catode)
K (russian K) - vibration proof
R (russian P) - vibration and radiation (nuclear reliability) proof

so 'EV' (rus EB) is 'long life' + 'vibration proof, high reliability' etc

also stamps:
ОТК - standard quality
ВП - military
ОС - ultra stable parameters

I'm sorry my thanks was for Oleg but also thanks to you Andrey.

 

[jfetter]

does a cross reference exist?

Done a lot of google on it even the old gov files nothing found.

 

[AndreyB]

Different plants - different tube types - some "better", other "the best" 🙂
I hear a lot good about tubes made in: "Voskhod", "Svetlana", "Reflector"

I think the right way is to try to find info on your exact tube type you need - for example when I need to find opinions about russian 6J1P-EV I find it on discussion pages about headphone amps which uses this exact tube:
Just for example: Little Dot Tube Amps: Vacuum Tube Rolling Guide
Regards, Andrey

 

[TheGimp]

http://www.worldtubecompany.com/mm5/merchant.mvc?Screen=TSL-RUSSIAN

Russische_Roehren

http://analogmetric.com/download/Vacuum tube cross reference table.pdf

Nice tables at the bottom:
http://igapop.arrakis.es/referenc.htm


Here is a thread with more links:
http://www.diyaudio.com/forums/tubes-valves/9982-online-tube-equivalent-chart.html

 

[jfetter]

Thanks, took a look and world tube is best.