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12ax7 tube rolling

  1. MisterDK

    Rolling 12AX7’s in my Phono pre…

    Hi folks! I recently put together an ear 834 clone phono which uses three, 12AX7’s. It’s had some of the common mods done and other than some tube hiss with volume up, it’s sounding very good. This is the first thing I’ve built in a long, long time and my first tube amp, ever. I noticed...
  2. John Parkey

    difference between Telefunken 12AX7 tubes

    Greetings everyone, please point me to previous threads if this has already been covered. Looking on Ebay, you can find Telefunken 12AX7 tubes with the diamond, made in Germany, 2 letter date code for $30-50 and then what appears to be same tubes for close to $200 or more. Just a single tube...
    • John Parkey
    • Thread
    • 12ax7 12ax7 tube rolling german tubes telefunken
    • Replies: 6
    • Forum: Tube Audio
  3. Gary Mattis

    Tube Rolling among the Great's 12AX7

    I decided to take the day and roll some 12AX7 pre amp tubes to try to decide what is my best sounding tube and I can't really say that only one brand of tubes would be my choice in every amplifier. I did decide on Amperex Holland in the end over Telefunken East Germany and Mullard Blackburn UK...
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