12AX7/ECC83

The 12AX7 is a high gain dual triode used in guitar amplifiers and hi-fi circuits. It is a 9 pin noval tube with two heaters that can be operated in parallel at 6.3V or series at 12.6V. First developed in 1947, it is now the most commonly used tube in the world. The 12AX7 is often used for guitar input circuits, phase inverters in high gain amplifiers, reverb recovery circuits, microphone preamps and direct boxes.

Equivalents to the 12AX7 include ECC83, ECC803 and 7025.
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    Tube Amp Doctor Premium Selected Preamp Tube, 7025WA SKU#: T-TAD-7025WA
    $22.50
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    Tube Amp Doctor Premium Selected Preamp Tube, 12AX7A-C SKU#: T-TAD-12AX7
    $17.50
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    Sovtek Preamp Vacuum Tube, 5751 SKU#: T-SOV-5751
    $16.80
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    Sovtek Preamp Vacuum Tube, 12AX7WB SKU#: T-SOV-12AX7WB
    $14.10
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    Sovtek Preamp Vacuum Tube, 12AX7WA SKU#: T-SOV-12AX7WA
    $13.80
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    Sovtek Preamp Vacuum Tube, 12AX7LPS SKU#: T-SOV-12AX7LPS
    $13.00
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    Shugaung Chinese Preamp Tube, 12AX7B SKU#: T-SHU-12AX7
    $7.50
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    Ruby Preamp Vacuum Tube, 12AX7C5 SKU#: T-RBY-12AX7C5
    $12.75
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    Mullard Reissue Preamp Vacuum Tube, 12AX7 SKU#: T-MUL-12AX7
    $19.35
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    JJ Preamp Vacuum Tube, ECC803/12AX7 Gold Pin SKU#: T-JJ-ECC803-GOLD
    $30.75
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    JJ Preamp Vacuum Tube, ECC803/12AX7 SKU#: T-JJ-ECC803
    $15.68
  12. Rating:
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    JJ Preamp Vacuum Tube, 5751 SKU#: T-JJ-5751
    $18.65
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