Tube has grey smooth plates, top O getter, tube tests: 94, 88 %.
Item Tag: 12AX7A ECC83
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RCA 12AX7 Black Plate “Tung-Sol” NOS/NIB MaxiPreamp2/TV7 Tested (1)Tube Lot
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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12AX7A/ECC83 Tungsram “Penta Lab” NOS/NIB MaxiPreamp2/TV7 tested
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly. See Photos for test results.
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2-Mullard 12AX7 ECC83 Grey Ribbed Vintage Electroncs
For your consideration are two Mullard Shield 12AX7 ECC83. The tubes tested at 48-50 & 52/56.
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NOS Pair RCA 12AX7A ECC83 Made in Japan Short Gray Plates Tests NOS Amplitrex
NOS Pair RCA 12AX7A ECC83 Preamp Tubes | Made in Japan | Short Gray Plates | Halo Getters. Tested on an Amplitrex AT1000.
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12AX7A/ECC83 “RCA” Mullard MaxiPreamp2/TV-7 Tested (1) tube lot
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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12AX7A/ECC83 Siemens Red Tip MaxiPreamp2/TV7 tested (1) tube lot
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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(1) NOS Amperex 12AX7A ECC83 Short Plate Dimpled Disc Getter Tests NOS Amplitrex
(1) NOS Amperex 12AX7A ECC83 Vacuum Tube |Orange Globe | Dimpled Disc Getter | Date Code I65 Δ0F4 | 1960 Heerlen Holland. Tested on an Amplitrex AT1000.
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12AX7A/ECC83 Mullard MaxiPreamp2/TV7 tested (1) tube lot
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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(2) Siemens Smooth Plate 12AX7 ECC83 Vacuum Tubes O Getters Test NOS on TV-7B/U
Tube 1 tests at 54/58 and tube 2 at 52/54 with 32 being the minimum score for a good tube (with 65% life remaining).