GE 6072 Triple Mica Black Plates Microphone Tube -Tests NOS AT1000 12AY7

TESTS NOS on Amplitrex AT1000. Amplitrex AT1000 Test Results 90%+ GM = Within NOS Specs 90%+ EM = Within NOS Specs. These fine tubes mostly made by GE or RCA are skyrocketing in price. 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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