Home › Forums › Help/Technical Questions › Which tubes and which position to the English Muff’in

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  • March 16, 2009 at 9:20 am #77903
    mwaltari
    Member

    Hello,

    I purchased an second hand English Muffin and kind of got idea from somewhere that it is originally shipped with two different type of the tubes. 12ay7 and 12ax7 if I am not mistaken.

    I think my pedal has now two JJ 12ax7 tubes installed and it gives too much of an gain.

    Which would be the original tube setting (if two different types, and which should be which) and if no, then was it 12ay7 tube the original one. I got an manual with pedal, but it’s information was very minimal.

    and does pedal have need for Biasing while relapsing the tubes or it is an Plug and Play-type of an Auto-biasing one???

    -TP-

    ps Sory if all this can be found somewhere on the site, or this forum, but I just could not find it (and sorry of my terrible English)

    March 16, 2009 at 10:16 am #92815
    electro-melx
    Moderator

    Hi there, The Muffin’ come stock with two 12AY7’s…..12ax7’s are the highest gain out of the 12a-7 types, here’s a rough run down of the types (gainiest to lowest gain)

    12AX7 (Highest Gain)
    5751 (High Gain)
    12AT7 (Mid/High)
    12AY7 (low/Mid)
    12AU7 (low gain)

    replacing one or both of the 12AX7’s with one of the lower gain models should lower the gain of the pedal quite a lot, there’s no need for Biasing on preamp tubes so you can mix and match which ever you like to get the sound you want.

    March 16, 2009 at 10:19 am #92744
    mwaltari
    Member
    Quote:
    Hi there, The Muffin’ come stock with two 12AY7’s…..so you can mix and match which ever you like to get the sound you want.

    Thanks man. any place (with sound samples) of tested good combinations…

    -TP-

    March 16, 2009 at 11:30 am #94558
    electro-melx
    Moderator
    Quote:
    Quote:
    Hi there, The Muffin’ come stock with two 12AY7’s…..so you can mix and match which ever you like to get the sound you want.

    Thanks man. any place (with sound samples) of tested good combinations…

    -TP-

    unfortunatly not that I know of..

    here’s what it sounds like with the standard 2x 12ay7’s though.

    December 7, 2014 at 11:12 am #120428
    agiant
    Participant

    does a 12AX7A work with this pedal?

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