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  1. 12AX7A Tungsram National NOS/NIB TV7 Tested Very Strong Balanced One (1) Tube

    This one tests very strong. Minimum good is 32.

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  2. GE 12AX7 1950's 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. 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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  3. AMPEREX 12AX7 ECC83 14mm Gray Plate Orange Globe Tubes PLATINUM MATCH on AT1000

    Triple Platinum Matched on Amplitrex AT1000. Amplitrex AT1000 Test Results 90%+ GM = Within NOS Specs 90%+ EM = Within NOS Specs. Amperex ECC83/12AX7 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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  4. 12AX7A Mullard etched Blackburn codes 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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  5. Mesa Boogie 12AX7-A Russian 2 Amplifier Valve

    Variant: Russian 2 production. Russian 2 version with stable, musical gain.

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  6. RCA 12AX7A TUBE PAIR (circa 60s box plate square getter strong tested) *****

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  7. NOS Rare 1951 12AX7 Long Gray Plates Bent [] Getter

    The NOS Rare 1951 12AX7 with long gray plates and bent getter. These early 1950s tubes, often from manufacturers like RCA, GE, or Tung-Sol, feature extended gray ribbed plates around 17mm long and a distinctive bent or D-shaped getter ring, contributing to low noise, rich harmonics, and classic tone.

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  8. Sylvania 12AX7A ECC83 Vacuum Tube Short Gray Plate Tested Strong

    Construction: short gray plate ring getter copper rods. Tested at: 71/79 plate current 7.9/8.2. The minimum is equal to 65% of the life of the tube. Glass: clear. Tested for shorts and gas. Date codes 912 0-26.

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