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german tubes

  1. 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
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