SYLVANIA 12AX7A Long Gray Plate Tubes PLATINUM MATCHED on AT1000 ECC83

Triple Platinum Matched on Amplitrex AT1000. Amplitrex AT1000 Test Results 90%+ GM = Within NOS Specs 90%+ EM = Within NOS Specs. Sylvania 12AX7A Tubes - TESTS NOS. All tubes are tested with the Audiophile in mind for SHORTS, GAS, MUTUAL CONDUCTANCE and NOISE (large tube lots are not tested for noise).

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