The tube was carefully tested on my TV-7D/U as shown in the photos with 36 min good (55-56=100%). They all sound wonderful on my hifi system. Super rare and hard to find now.
Item Tag: Unit
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Sylvania 7591 7591A Excellent Testing Values Matched Quad
The tube was carefully tested on my TV-7D/U at 68-70-70-72/36 min good (55-56=100%). They all sound wonderful on my hifi system. Super rare and hard to find now.
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CMI Sylvania 7591 7591A NOS Excellent Testing Values Tightly Matched Pair
These tubes are carefully tested on my TV-7D/U at 60-64/36 min good (55-56=100%). They sound wonderful in my hifi system. Super rare and hard to find now. What you see is what you get.
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New 2x Tung-Sol 7591A | Matched Pair / Duet / Two | Power Tubes | Free Ship
Matched Octet. Matched Sextet. We all know that swapping out tubes can be one of the more effective ways of improving your tone. At Tonal Tubes, we help you achieve that next level tone. Matched Quad.
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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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LOT 5 EACH GE 5814WA TRIPLE MICA (12AU7/6189) TUBES TESTED VERY STRONG TV7/D
LOT OF 5 EACH 5814WA GE TRIPLE MICA TUBES. ALL TESTED STRONG ON TV7D TESTER. ALL 59-47 DATE CODE.
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QTY 6 – MIL SPEC – 5814A – VACUUM TUBES – AMPLITREX TESTED – MIXED – VG-GD
MIXED – 5814A – VACUUM TUBES – AMPLITREX TESTED -.
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New NOS Qty 1 SYLVANIA JHS 5814A Grey Plates D Getter 1959 NOS Vintage Tube USA
Tube will be in the Original JHS SYLVANIA box as shown in the pictures. Passed all tests on our EICO 666 Tube Tester – Tests New – Very Strong.
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2 General Electric 5814A 12AU7 Black Plate Triple Mica TV7 Tested Strong Tubes
These tubes have been tested on a TV7 tube tester with all shorts tested. Part Number: 5814 (12AU7). Tested values.
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LOT 5 EACH SYL 5814A TRIPLE MICA TUBES TESTED VERY STRONG TV7/D
LOT OF 5 EACH SYLVANIA 5814A TRIPLE MICA TUBES. ALL TESTED STRONG ON TV7D TESTER.