12AU7A = ECC82 = 7030. RCA USA 12AU7A. 12AU7A FACTORY SPECIFICATION is 10,5mA/10,5mA for 100% mA. REAL 1950s RCA LONG -PLATE 12AU7A. Since The Einstein Preamplifier uses only one 1 x 12AU7, it’s important to have a mirror-matched triode tube, low-noise balanced & matched like this 12AU7A.
Item Tag: 12AU7A
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Quad 4 Conn by RCA 12AU7A ECC82 Tubes, Closely Matched, Clr Top, Lg Pl, #2
From a larger lot of RCA / Conn tubes mostly from the 50s/60s. Tube are matched by Gm. Power tubes like the 6L6 are tested only with the 686 which includes plate current (Ip), shorts and gas tests.
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GE 5814A 12AU7A 3-Mica Short Pinched Grey Plates TV7 Tested Strong
Tested NOS at 98/98gm (56 is minimum) using a professionally calibrated TV7U tube tester.
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Pair RCA Conn 12AU7 Clear Top Tubes Test 90/90%+ Matched Strong Amplitrex 12au7a
Amplitrex tested at 90/90% plus. Very nice strong pair of clear top rca tubes! Pair matched within 5% of each other.
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1960 Matched Pair RCA 12AU7A ECC82 ‘Clear Top’ – Tested Strong!
Tubes tested well into the green on my Eico 666 tube tester, please email with any questions or concerns. Thanks for looking!
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Pair (2) vintage 1960s Sylvania Baldwin 12AU7A vacuum tubes – TV-7 test as NOS
This listing is for a Pair (2) of vintage 1960s Sylvania Baldwin 12AU7A vacuum tubes. Long grey plates with top halo getters. They are used but the pair you will receive will test above minimum new spec (86/86) on my TV-7. Readings will be provided for each tube in the shipping box (sorry I don’t have time to provide this in advance). Also tested for shorts and gas. And I popped each in an amp and they sound great. As you may know, organ tubes were selected for their low noise floor and Baldwin got some of the best. Guaranteed good. Returns accepted. No boxes. Thanks!
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Pair (2) 1960s Sylvania Baldwin 12AU7A TV-7 Tested as NOS, Platinum Matched
30 Day unconditional guarantee. This listing is for 2 vintage 1960s Sylvania manufactured Baldwin or Conn 12AU7A non-microphonic vacuum tubes. The tubes are used but test better than the TV7 NOS test score of 86,86 (triode 1, triode 2). Platinum Matched, each tube test scores matched within 5 points. Checked for noise and microphonics at V1 in a SE tube amp. Tubes have Long grey plates and Halo getters. Also tested for shorts and gas. Test Scores on each tube box.TV7 NOS test score is (86,86). You will receive 2 tubes and 2 tube boxes for the listed price.
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2 NIB NOS Tektronix selected RCA 12AU7 tubes TV7 & AT1000 tested excellent
AT1000 test results 2 NIB NOS Tektronix selected RCA 12AU7 tubes. Minimum good 12AU7 per section-Gm: 1.40 mA/V, Ip: 6 mA. Nominal/new 12AU7 per section-Gm: 2.20 mA/V, Ip: 10 mA. Excellent testing and great sounding tubes.
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NEW OLD STOCK PLATINUM MATCHED PAIR MULLARD BLACKBURN 12AU7 ECC82 CODE MATCHED
Up for sale is a premium matched pair of Amperex-labeled Mullard Blackburn 12AU7A / ECC82 vacuum tubes, both carrying matching B3H4 etched Blackburn factory/date codes. These were manufactured by Mullard Blackburn, England, and labeled for Amperex.