Triode:1 Tested NOS: 65/ 32 Baseline. Triode: 2 Tested NOS: 60/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top O Getter. 12AX7A / ECC83 SYLVANIA Tube. Made In USA. No universal test result defines NOS.
Item Tag: 12AX7. ECC83
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12AX7/ECC83 Telefunken Berlin Smooth Plate 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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12AX7/ECC83 Telefunken Berlin Smooth Plate 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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1961 12AX7 7025 Sylvania Tube Gray Short Plate O Getter TV7 Test NOS SY-7
Triode:1 Tested NOS: 80/ 32 Baseline. Triode: 2 Tested NOS: 74/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top O Getter. 12AX7A / ECC83 SYLVANIA Tube. Made In USA. Manufactured in Altoona, Pennsylvania in 1961 39th Week.
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12AX7 ECC83 SINGLE TUBE VERY RARE TAIWAN VIDEON 1960s 1700/1700 (106%/106%)
12AX7 / ECC83. RARE TAIWAN MADE 12AX7. During the 1960s and 1970s, major global electronics corporations set up offshore facilities in Taiwan to capitalize on low labor costs, shifting mass production there from the US and Japan.
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Perfectly Matched Pair of Mullard 12AX7 ECC83 mC1 1957 Shield Vacuum Tubes #2
Beautiful pair of Mullard 12AX7 long plate square getter mC1 tubes, with identical shield logos. Perfectly matched and balanced for Gm on the Amplitrex AT1000. 1957 Blackburn, UK, date codes. Date codes mC1 B7B & mC1 B7F.
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RARE BRIMAR 12AX7 LONG BLACK PLATE SQUARE GETTER 1954 – Tested EXCELLENT
RARE BRIMAR 12AX7 long black plate angled square getter 1954. Amplifier and AVO Mk4 Tested: Ia 1.05/0.95 GM 2100/2000 = 100+/100%.
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1959 ??? Amperex 12AX7 Quad “The Fisher” Tubes – Amplitrex Tested – I61
Up for sale, a quad of Fisher 12AX7 Holland tubes. These are all still testing pretty well – all results shown. Labels are decent to fair. Notes on testing. (Test rig is pictured for reference.).
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4 Tightly Matched Quad 1959 Raytheon BLACK Plate 12AX7 ECC83 Amplitrex STRONG
4 Tightly MATCHED & BALANCED Quad of Raytheon made for Baldwin 12AX7 / ECC83 Preamp tubes. Identical date codes on all 4 tubes date from 1959. They all feature long, BLACK plates with a top-mounted, “O” getter.
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1960s 12AX7 ECC83 Tung-Sol Tube Gray Long Plate O Getter TV7 Test NOS TS7-10
1960’s 12AX7 / ECC83 GAP/R Computor Tube. Made In USA. Triode:1 Tested NOS : 45/ 32 Baseline. Triode: 2 Tested NOS: 45/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top O Getter.