5751

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The 5751 is a dual triode tube with a B9A (Noval) miniature 9-pin base, essentially an improved 12AX7.

Tek part number: 154-0094-00

Aged/Checked/Matched Pair Details
Used in Tek Part# S/N Range
Type E Plug-in 157-0033-00 All

157-0033-00 has been replaced by 12AX7

Reference:

Tube aging procedure / Selection and checking procedure


Links