You are buying a trio (3) lot of the well regarded 1955 RCA long black plates. top angled “D” getters. 12AU7 preamp tubes. These tubes were born in 1955 in the USA. No shorts and are ready to use for your next audio project(s).
Item Tag: 12AU7
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1950s RCA USA 12AU7A ECC82 7030 LONG-PLATE SINGLE-TUBE HOLY-GRAIL “D-GETTER” NOS
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.
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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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2- RFT 12AU7A ECC82 Vacuum Tubes Tested NOS/NIB Matched Pair Germany
These valves are of very good quality and have excellent consistency. Minimum Gm 1560.
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12AU7 SIEMENS ECC82 CHROME PLATE VINTAGE TUBE NOS (1962) *eTracer #SIE2L1
All test within the dataset expected for a new tube on our eTracer curve tracer. Triode #1 – Plate Current = 9.31mA Rp = 8247 Gm = 2072 Mu = 17.1 Corners = PASS. Triode #2 – Plate Current = 9.21mA Rp = 8659 Gm = 1993 Mu = 17.2 Corners = PASS.
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Matched Pair of 5814A (12AU7) Tubes Tested Excellent on Hickok 533A
Lot of (2) 5814A tubes. Tube #2 2180/2160 gm.
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CBS Hytron 5814A Vacuum Tube USA 12AU7 Type NOS Vintage Pre 1950 Black Inside
For sale one Have 4 in stock Black inside not gray Pre 1950s tubes here Vintage CBS Hytron 5814A vacuum tube. • Made in USA • Equivalent to 12AU7 • Military/industrial grade tube • Orange print, vintage production • Appears NOS • Clean pins, no visible damage • Untested – no tube tester available Highly regarded for audio and vintage equipment use. Sold as-is, untested, no returns. US mainland shipping only.
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Mullard 5814A 12AU7 Sleeve 4 NOS, 1 Dud
This is a sleeve of 5 NOS Mullard 5814A/12AU7A tubes. One tube lost its vacuum and is a dud, but is included anyway. Of the other four, two are black plates and two are gray plates. All are triple mica with “Mullard” and “Made in USA” printed on the glass. TV-7 test data is as follows (left to right in the photo): Tube 1: dudTube 2:86 86Tube 3:72 82Tube 4:96 100Tube 5:84 88 A reading of 86 would be new/nominal for a 12AU7 on a TV-7, so these are all measuring excellently, save for one of the triodes on tube #3.
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GE JG-5814A. High Grade 12AU7. Triple Mica. Matched. Test Strong And Balanced.
Testing is done with Superior TW-11 Tester. This tester is a cathode emission tester. The results are useful for relative matching of same type tubes, and also a good/bad result. Tubes are checked for filament continuity. The results should be taken as a general indication of tube health. I am happy to combine shipping on multiple purchases. For USA customers, duty and brokerage is prepaid to ensure quick hassle free delivery.
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Sylvania JAN 5814A Short Grey Plate Vacuum Tube TV7 Tested Strong
Tested strong using a professionally calibrated TV7U tube tester at 90/92gm (56 is min).