Includes amplitrex at1000 results as seen in photo, nice silkscreen (fragile) and box included.
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Taper base edition featuring copper grid rods, which minimize cathode-current contamination, and dissipate heat better. full mutual conductance gm % test + life test pass (longetivity indicator) + an impeccable leak / short / gas check.
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12ax7 ecc83 cv4004 5751 e83cc ecc803 6057 6681 7025 7058 7729 b759 m8137 12rhh14. old panasonic audiophile crown-jewel, highly revered for incredible sound reproduction, and often compared to mullard sonics.
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This top shelf 12ax7wa equivalent includes the oe box, visible ei etch code, top shelf rugged 12ax7 ecc83 upgrade. illuminate your stereo/preamp w/ a pristine silkscreen long plate 7025 by ei yugo, legendary groove tube screened.
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In a tube exist 4 layers of mica, 2 sustaining the internal structure and another 2 sustaining internal structure and fixing it to the glass; the bottom mica layers are superimposed looking like a single layer, that's we see triple mica.
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12AX7 / TUBE 1.3 1.5 1.8 1.9. 100% is : Ia = 1.2mA & S=1.6mA/V.
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Early+late 1969 editions = great for tone rollers+collectors to experience copper neck + earliest floating parasol getter types.
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12ax7 ecc83 cv4004 5751 e83cc ecc803 6057 6681 7025 7058 7729 b759 m8137 12rhh14. carefully curated classics, this 2x piece (pair) has pristine shrinkwrap condition, w/ intact gold foil seal, factory fresh.
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