Are Chinese 6N2 the same as Russian 6N2P?

[homemade]

I did search , but still unsure if the 6N2 is equal to the Russian 6N2P. I'm looking for alternatives to the Chinese 6N2 , so ultimately , I need a tube that will work .

[Eli Duttman]

AFAIK, it is. Look at the data sheet. Notice the Hanji character directly adjacent to the 6N2. I can't decipher such things, but a "P" sound would not be surprising.

While the type pins out like a 6922, the triodes are the "same" as those in a 12AX7/ECC83. If the unit you are working on is point to point wired, connecting pins 4 & 5 to a heater power lead and pin 9 to the 2nd heater power lead is all that's needed to use the 'X7. More than 1 decent and affordable 'X7 variant is available.

[ja2dhc]

Originally Posted by homemade

I did search , but still unsure if the 6N2 is equal to the Russian 6N2P.

Here is a datasheets of Russian 6N2P.

http://klausmobile.narod.ru/td/data/_6n2p.GIF

It is identical to Chinese 6N2 as shown below.

http://www.mif.pg.gda.pl/homepages/f.../095/6/6N2.pdf

Both of them describe Mu is 97.5.

[homemade]

Thank you for the data sheet. The 'pre amp' board I'm using is printed circuit. One of these pre-made Chinese SRPP on ebay. I'm using it to amplify a resistor i/v mod in a tda1541 player. One of the tubes was damaged in shipping , so I'm just looking for a tube(s) that will work.

[ja2dhc]

Originally Posted by homemade

Thank you for the data sheet. The 'pre amp' board I'm using is printed circuit.

When I went to China as a business trip, I bought a PCB which is a raw
PCB without components assembled for DIY purpose. I analyzed the
circuit schematic and published it in my blog below (sorry written in Japanese,
but you can see photograph).

http://ja1cty.at.webry.info/200912/article_3.html

The schematic uses 6N3 whose Mu is 36. Therefore the amp gain of this
SRPP is 15.5 which is calculated by a circuit simulation.

[homemade]

Originally Posted by ja2dhc

When I went to China as a business trip, I bought a PCB which is a raw
PCB without components assembled for DIY purpose. I analyzed the
circuit schematic and published it in my blog below (sorry written in Japanese,
but you can see photograph).

�ãŠC‚Å�^‹óŠÇƒ‰ƒCƒ“ƒAƒ“ƒv‚Ì‚o‚b‚a”ƒ‚¢‚Ü‚µ‚½ JA2DHC/JA1CTY‚̃uƒ�ƒO/ƒEƒFƒuƒŠƒuƒ�ƒO

The schematic uses 6N3 whose Mu is 36. Therefore the amp gain of this
SRPP is 15.5 which is calculated by a circuit simulation.

Very good to know

I purchased 2 of these boards; one uses the 6N2 , the other uses 6N1. Both 'SSRP' config. Seems the 6N2 has a mu of 100 , so I guess the srpp circuit gives a gain of about 50(?). The 6N1 board has lower gain , as expected , with a mu of 30. The 6N2 circuit allows use of a smaller i/v resistor , so perhaps , less distortion(in theory). I'll try some 6N2P-EV tubes in the 6N2 board.

[sulcorebutia]

Originally Posted by Eli Duttman

AFAIK, it is. Look at the data sheet. Notice the Hanji character directly adjacent to the 6N2.

The Hanji character directly adjacent to the 6N2 means "type". The whole sentence that line is "6N3 type Dual Triodes".


Chinese 6n2= Russian 6N2P (6h2n in cyrillic?)

Eli is right, there seems to be no Western equivalent. It stuffs two 12ax7 alike triodes with 6922 pin out.

[sulcorebutia]

Originally Posted by sulcorebutia

The Hanji character directly adjacent to the 6N2 means "type". The whole sentence that line is "6N3 type Dual Triodes".


Chinese 6n2= Russian 6N2P (6h2n in cyrillic?)

Eli is right, there seems to be no Western equivalent. It stuffs two 12ax7 alike triodes with 6922 pin out.

typo mistake: The whole sentence in that line read as "6N2 type Dual Triodes".

[Arnulf]

Originally Posted by homemade

Thank you for the data sheet. The 'pre amp' board I'm using is printed circuit. One of these pre-made Chinese SRPP on ebay. I'm using it to amplify a resistor i/v mod in a tda1541 player. One of the tubes was damaged in shipping , so I'm just looking for a tube(s) that will work.

With your question answered already, I was wondering what the point of using ECC83-like tube in SRPP would be ? If one needs extra drive, a follower (using an '81 or '82) will do better. If extra drive is not needed, then it's a waste of 1/2 of tube.

[homemade]

Originally Posted by Arnulf

With your question answered already, I was wondering what the point of using ECC83-like tube in SRPP would be ? If one needs extra drive, a follower (using an '81 or '82) will do better. If extra drive is not needed, then it's a waste of 1/2 of tube.

I am quite certain that your assessment is correct. We'll need to blame Lampizator for this , as he is enthusiastic about this type(SRPP). I know little about tube circuits. These boards became available on ebay pretty cheap. And I like the horizontal tube layout , as they fit nicely in most cd players(Philips 1541 types at least). They also have the necessary gain for use with resistor i/v low output.