be sure to check out our official site! more part numbers added daily, and free postage!
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2 vintage matched toshiba 6ca4 ez81 preamp audio tubes, revered worldwide for a rich and creamy holographic tone
these early dgetter versions have very special selection marks for military/communications arrays, the highest grade
these old production types also have the most precious tube-era metallurgy resolution and warmth
carefully curated and screened direct japan import, also twice tested for unparalleled accuracy
full amplification test 87/86 ~ 85/84 % gm (65 % good) and life check pass w/ no meter movement!
our unique gm output test applies 225 vdc simulating actual circuit operations w/ filtered dc + leak short gas check
simply put the higher mutual gm = better amplification capability via gain and bass response
also supplier double checked via tv7 for conductance ...while your bench results will vary the circuit test is the best test
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all tubes also undergo a proprietary complimentary value added refurb process, one of a kind seller qc!
ships well packed worldwide, combined postage available, includes plain boxes or fragile oe boxes
~authentic vintage hifidelity audio curation by caliacoustics~
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ecc88 pcc88 e88cc e188cc e82cc, 6dj8 7dj8 6922 7308
12ax7 12at7 12au7 12bh7, ecc83 ecc82 ecc81 ecc88
ez81 ef86 el84 el34 e180cc, 6bq5 6267 6ca7 6ca4 gz34
7189 7062 6201 5814 5751, cv4004 cv455 cv2492 cca e88cc/01
6v6 6l6 6sl7 6sn7 5ar4 5y3 5u4, 6aq5 6005 6aq5w
new arrivals! ~ tube testers / e82cc siemens / pinched 7308 gold pin / sealed box 6v6 / 5u4 bplates