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Old 1st July 2004, 07:36 PM   #1
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Location: Sofia, Bulgaria
Default Can I use this tube?

Hi. I am thinking of building my first headphone tube amp simillar to Morgan Jones amp. My questions are:
Can I use the russian 6N9S tube? (cyrillic transcription). It has simillar characteristics as 6N1P which is used in MJ clone (the project in HeadWize)?
Since the voltage in my country is 220vAC is it necesary to use a trnsformer for the main ( not filament ) power supply? In the project it uses a Hammond 269AX to convert 110VAC to 240VAC. Thanks.
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Old 2nd July 2004, 12:21 AM   #2
G is offline G  United States
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Location: Belleville, IL.
Default Re: Can I use this tube?

Quote:
Originally posted by the_villain
Hi. I am thinking of building my first headphone tube amp simillar to Morgan Jones amp. My questions are:
Can I use the russian 6N9S tube? (cyrillic transcription). It has simillar characteristics as 6N1P which is used in MJ clone (the project in HeadWize)?
Since the voltage in my country is 220vAC is it necesary to use a trnsformer for the main ( not filament ) power supply? In the project it uses a Hammond 269AX to convert 110VAC to 240VAC. Thanks.
I'm not familiar with the tube but I'm sure that if it is a medium mu triode with similar characteristics to a 6N1P that it can be used. It is DEFINATELY necessary to use a mains transformer. This is a matter of safety! I'm sure that one of Hammond 300 series power transformers will get the job done. They are "universal transformers" which can be used with a wide variety of different mains voltages. After that just follow the schematic and you are home free. Always use a transformer with electrical devices. They provide isolation between you and death, noise and other bad things. Use a fuse too!!
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Old 14th March 2006, 02:49 PM   #3
Ansius is offline Ansius  Latvia
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this tube is exactly the same as 6SL7 and it is good... russians after that made a beter wersion / replacment called 6n2p (really similar to 12ax7 exept heating).
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Old 20th January 2008, 10:56 PM   #4
datoan is offline datoan  Georgia
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Join Date: Dec 2007
Default 6N9S

Hi
I collected 10 different types of Russian 6N9S and these tubes has absolutely different sound. I already prepared photo album with these 10 tubes each has short description, if you are interest to find your tube please visite this link:
http://entertainment.webshots.com/album/562167001PsmXZU

Good luck
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