12BH7/ECC99

The 12BH7 is a medium gain dual triode used in hi-fi amplifiers, pro audio equipment and some guitar amplifier circuits. It has the same pinout as the 12AX7 but is not electrically compatible and is taller. The 12BH7 is capable of delivering a substantial amount of current output and is often used as a line driver in microphone preamps, Hammond organs, and tube compressors where a transformer is used to drive a balanced line output. It is also used to drive output tubes in hi-fi amplifiers and in the Ampeg SVT. Some newer low wattage amplifiers use it as an output tube.

The JJ Electronic ECC99 is similar in many ways to the 12BH7 but does vary in some parameters. Check with the manufacturer of your equipment before making a substitution.
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    Tube Amp Doctor Premium Selected Preamp Tube, 12BH7A-STR SKU#: T-TAD-12BH7
    $19.95
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    JJ Preamp Vacuum Tube, ECC99 Gold Pin SKU#: T-JJ-ECC99-GOLD
    $42.35
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    JJ Preamp Vacuum Tube, ECC99 SKU#: T-JJ-ECC99
    $19.75
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    Electro-Harmonix Preamp Vaccum Tube, 12BH7 SKU#: T-EH-12BH7
    $17.85
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