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.
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:
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:
Attachments
Last edited:
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
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
Last edited:
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
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
Last edited:
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.