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  1. 2x Vintage SameCode MilitaryFlag OEBox MC1 MazdaFrance 12AX7 /ECC83 E83CC ECC803

    12ax7 ecc83 cv4004 5751 e83cc ecc803 6057 6681 7025 7058 7729 b759 m8137 +. mc1 f7h1 code, carefully curated classic audiophile tubes. full mutual conductance gm micromhos % test + life test (longetivity indicator) + gas / leak / short / sound checks.

    eBay

  2. 12AX7 ECC83 SIEMENS PLATINUM MATCHED PAIR,NATO specs TV7 tested 1TG3

    (TWICE TESTED;. 2nd)TUBES ARE NOT USABLE UNLESS AUDIO TESTED WITH NO HUM and NON-MICROPHONIC USING MODIFIE D DYNACO PAS 3 & TUBE OTL. TUBE1) 50/50 & 5.1/5.3 ma.

    eBay

  3. Telefunken ECC803S 12ax7 E83CC ec83 Gold Pins NOS NIB Matched Pair

    I'll give you testing photos and the exact tube before sending them out. There are several pairs available. What you see is what you get.

    eBay

  4. 2x NOS CBS Hytron TopD 3Mica BlackPlate 5751 /Premium 12AX7 ECC83 ECC803 E83CC

    One of the highest ranked preamp/audio tubes ever made, '50s black plate cbs hytron were limited runs and quite collectible. cbs hytron ~ a premium vacuum tube manufacturer, known for long life low noise legendary playback, only made until 1961.

    eBay

  5. Vintage TESLA E83CC/12AX7 Gold Pins Tubes NOS Same Date 2pcs. V. 1976

    Equivalent ECC83, 12AX7. Condition: NOS tubes. Date: V. 1976. I send parcels within 24 hours. Made in Czechoslovakia Roznov.

    eBay

  6. NOS Brimar 6057 E83CC CV4004 Yellow T Test V Good Balanced Triode Tube

    6057 - ECC83 - 12AX7 - CV4004 - E83CC. Brimar / 6057. NOS BRIMAR. This is a VERY RARE item, British made during the 1960s or earlier. It features a single O-getter, Yellow-T (yellow shield) markings, and black boxy anode plates.

    eBay

  7. 2x Matched 3Mica DGetter 1957 RCA △ USA 5751 ~ Premium 12AX7 ECC83 ECC803 E83CC

    The high power 5751 are premium 12ax7 ecc83 w/ slightly less gain, introduced in 1949, as military spec and industrial grade. popular alternative to tungsol / hp command / cbs hytron / general electric, rare 1957 production, authentic rca triangle △ base.

    eBay

  8. 4x Military UFO SolidDisc GE USA 5751 ~ Grail LowGain 12AX7 ECC83 ~ E83CC ECC803

    The high power 5751 are premium 12ax7 ecc83 w/ slightly less gain, introduced in 1949, as military spec + industrial grade. originally designed for aviation, the costly 5751 design is more rugged + less prone to microphonics, w/ higher power 175ma.

    eBay

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