Manufactured in 1963. Slightly used with tons of life left! Test results are as follows with 32 being the minimum value (65%), low NOS is 42 (85%) and NOS is 49 (100%) 12AX7/ECC83 Tubes ~ MATCHED PAIR.
Item Tag: Siemens
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12AX7A/ECC83 Siemens Red Tip MaxiPreamp2/TV7 tested (1) tube lot
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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1 meter Klangfilm Siemens speaker cable field coil copper 1960ies
4 pure copper stranded conductors, copper shielding then extra tinned copper shielding and a third steel shield.
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(2) Siemens Smooth Plate 12AX7 ECC83 Vacuum Tubes O Getters Test NOS on TV-7B/U
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).