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  1. 1x Mullard ECC83 Valve Tube Box []-get 1956 Eq 12AX7 CV492 B339 CV4004 M8137

    1x Mullard ECC83 Valve. Date Code: 641 R6L(1956). This valve has also been tested in amplifier without any noise. Tested by AVO VCM Tester.

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  2. CV4004 ECC83 12AX7 A Mullard Box Anode 641 R2A2 New Old Stock Valve Tube Jan22B

    CV4004 ECC83 12AX7 Mullard Mitcham. Test results This Valve. IA.88 GM: 1.4.

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  3. Mullard CV4004 M8137 12AX7 Box Plate Valve Tube Used (V13)

    CV4004 M8137 ECC83 12AX7 Valve Tube. Mullard, British Made. Used, Supplied in White Box. Box Plates, Halo Getter.

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  4. 1x Mullard 12AX7S CV4004 Valve Tube Box Anode Eq ECC83 CV492 B339 M8137

    1x Mullard 12AX7 Valve. This valve has also been tested in amplifier without any noise. Ia1 = 0.95(mA), gm1 = 1.45(mA/V).

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  5. ECC83 12AX7 MULLARD 1970's NEW LOGO NOS MATCHED PAIR VALVE TUBE (T15B)

    ECC83 MULLARD (12AX7). MATCHED PAIR (2 TUBES). BLACKBURN CODES IN GLASS. TESTED NEW AND UNUSED. 14mm PLATES, RING GETTER.

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  6. Mullard ECC83 12AX7 MC1 B6G Long Plate Square Getter BVA Blackburn 1956

    Mullard ECC83 in good working condition. Long plate square getter, tests as 100% on a uTracer tester, appears to be in original box so may be NOS. Note: my uTracer valve tester has been “calibrated” using an uncalibrated multimeter so does indicate functionality and a ballpark idea of quality but not necessarily accurate performance data.

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  7. Rare Mullard 7025 Low Noise 12AX7 ECC83 Tube I61 Amplitrex Test 12AX7 B339 D

    Here we have for sale is a rare and hard to find Mullard 7025 tube. Low noise variant of their I61 series 12AX7 ECC83 Tube. I61 series tube with the copper grid rods, 14mm grey plates and O-getter.

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  8. Rare NOS RTC 12AX7S ECC83 Tube Mullard M8137 CV4004 Amplitrex Test 12AX7 7025 D

    Here we have for sale is a very rare 12ax7 ecc83 tube. This is a NOS RTC Radiotechique Corp. 12AX7S ECC83 tube. With the “S” prefix which stands for Special or Select. The 12AX7S tube number is not very common and is a rare find in the USA and highly sought after.

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