Tube 1 tests at 54/58 and tube 2 at 52/54 with 32 being the minimum score for a good tube (with 65% life remaining).
Item Tag: 12AX7A ECC83
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(2) Sylvania 12AX7A ECC83 Preamp Tubes Gray Plates O Getters Tests NOS Amplitrex
(2) Sylvania 12AX7A ECC83 Preamp Tubes | Gray Plates | O Getters. Tested on an Amplitrex AT1000.
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(1) NOS Mullard GE 12AX7A ECC83 Tube I63 B1B4 Blackburn UK 1961 Tests NOS TV-7BU
(1) NOS Mullard GE 12AX7A ECC83 Vacuum Tube | Excellent Condition | Blackburn UK Produced 1961 | Factory Date Code I63 B1B4. Tests at 60/54 with 32 being the minimum score for a good tube (with 65% life remaining).