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  1. NOS Ei For National/12AX7A/LONG SMOOTH PLATES/O GETTER/HIGH GAIN/MAXI TEST

    NOS Ei For National/12AX7A/LONG SMOOTH PLATES/O GETTER/HIGH GAIN/MAXI TEST

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  2. GE 12AX7A 1960's Short 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. 12ax7a by PM, new,fully tested from factory

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  4. 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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  5. Pair of GE 7025 12AX7A NOS NIB Vacuum Tubes - 6% matched

    Fantastic, mint pair of GE 7025/12AX7A tubes, with original boxes. Gm matched to about 6% difference on the Amplitrex AT1000. Identical date codes. These are from a master case of 100, as shown in the last two pictures.

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  6. NOS RCA 12AX7A ECC83 12AX7 USA TUBE CREAM OF THE CROP HIGHEST EMISSIONS!

    (# 231335324005 ). (#231335324005) 07/20/2016. (#231335324005). The 12AX7A was an 'improved' 12AX7. NOS RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ VOX MARSHALL Dr.Z (#290728035820). RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#290497360769).

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  7. Matched Pair NOS RCA 12AX7A ECC83 Musical Audiophile Amplifier Tubes

    The small O-getter (a miniature halo or ring-shaped barium flash at the top) ensures gas-free stability and minimal hum, making them a go-to for V1 positions where clarity reigns. Collectors dub them “workhorse grails” for their reliability without the fragility of long black-plates—smooth, detailed, and versatile without breaking the bank.

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  8. 12AX7A ECC83 NOS NIB RCA MATCHED PAIR TUBES MUSEUM TESTED "GAME CHANGER" 1963

    NOS 1963 RCA 12AX7A. THESE ARE THE "TOP RCA 12AX7A TUBES ANYWHERE"." - Tube Museum New York. (OLDER 1963 RCA PRINT STYLE CONDITION AS DISPLAYED). MATCHED BALANCED NOS PAIR! Made in the U.S.A. in 1963.

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