12AX7

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12AX7A Tube

The 12AX7  (European: ECC83) (P/N 154-0043-00) is a dual triode vacuum tube with a B9A (Noval) miniature 9-pin base. The high-reliability version is the 6057 (E83CC).

The 12AX7 is used in the Type E, and as an error amplifier in the power supplies of many Tektronix instruments, including the 513, where it was chosen for its high gain.

The 5751 is an improved successor.

Aged/Checked/Matched Pair Details
Used in Tek Part# S/N Range
122 157-0032-00 All

Reference:

Tube aging procedure / Selection and checking procedure

Pictures

Links