2 x 5814A (12AU7) RCA Tubes. Tested on Enhanced Triplet E3444 Laboratory Tester. NIB = boxes may be tattered. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.
Item Tag: RCA
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2 x 5814A (12AU7) RCA Tubes*Super Strong Pair*Black-O*NOS_NIB* #R5
2 x 5814A (12AU7) RCA Tubes. Tested on Enhanced Triplet E3444 Laboratory Tester. NIB = boxes may be tattered. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.
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1 x CRC-5814A(12AU7) RCA Tube*Black Plates-O*Very Strong Testing*Command*#2
Tested on enhanced Triplet E3444 Laboratory Tester by Paul Hart of Roswell Ga. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. 1 x 5814A-12au7 RCA Tube.
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5 Nice Tested RCA 5814A (12AU7) Vacuum Tubes
1 LOT OF 5 EACH RCA 5814(A) TUBES. TESTED STRONG TV7D (90+ MIN).
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2 x 5814A (12AU7) RCA Tubes*Super Strong Matched*Black-O*MEATBALL*NOS_NIB* #R3
2 x 5814A (12AU7) RCA Tubes. Tested on Enhanced Triplet E3444 Laboratory Tester. NIB = boxes may be tattered. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.
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Matched Pair of RCA JRC 5814A/12AU7/ECC82 Vacuum Tubes : Black Plate
Matched Pair of RCA JRC 5814A/12AU7/ECC82 Vacuum Tubes. Up for sale is aMatched Pair of RCA JRC 5814A/12AU7/ECC82 Vacuum Tubes. (Minimum is 56 for 12AU7). Model : JRC 5814A/12AU7/ECC82. I tested tubes on my TV7B/U tube tester.
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(2) MATCHING DATE CODE NOS RCA 5814 A Black Plate USAF Tubes ~ 1960 ~TEST STRONG
Beautiful Condition Pair of Tubes that seem unused. Both test strong and have completely matching date codes as well as the JA production stamp.
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2 x 5814A (12AU7) RCA Tubes*Very Strong Matched*Mica-Black-O*Command Type* #10
2 x 5814A (12AU7) RCA Tubes. Tested on Enhanced Triplet E3444 Laboratory Tester. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. What were your tubes tested at?.