Will somebody please explain the Russian 6N2P tubes to me

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by BigPapiFan, Dec 18, 2009.


  1. BigPapiFan

    BigPapiFan Member

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    I keep seeing Ebay listings for 6N2P (6H2Pi)tubes where they are described as 12AX7A / ECC83 replacements. But I have read that they are, in fact not a straight drop-in replacement and that you have to modify your amplifiers to use them. What the real story?
     
  2. phsyconoodler

    phsyconoodler Member

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    I can't read the russian on the data sheets,but it looks like it's screen is pin 9,which is the heater center tap on a 12AX7.
    You would modify the heater wiring and separate pins 4 & 5 for sure.
    Beyond that someone who has used them needs to pipe up.
     
  3. SysCrusher

    SysCrusher Member

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  4. SirElwood

    SirElwood Member

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    It is not screen. It is internal shield between triodes. And it should be connected to ground.

    Nice tubes btw. and with a little heater modification great alternative to 12AX7 tubes. Very low noise and "smooth" sound. And cheap! I bought 16 tubes for under 30€ inc. shipping. I like them alot.
     
  5. elkym

    elkym Member

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    Yeah-- instead of connecting pin 9 to one side of the 6.3v taps and the other to the pins 4 and 5-- pin 4 will connect to one side of the heater taps and pin 5 to the other. Then ground pin 9. Or don't-- I'm not sure it'd really matter. Audiophile types like the 6n2p and 6n1p tubes. They're fairly low gain, I'm told-- 12ax7 is 100, 12at7 is 70, 12au7 is 19
    The 6n1p is supposedly 24-25 or so. Not sure about the 6n2p.

    If you'd like to be able to just sub them in-- you can install a switch... here's a thread from a little while ago.

    http://www.thegearpage.net/board/showthread.php?t=636947
     
  6. BigPapiFan

    BigPapiFan Member

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