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.).
Item Tag: 12AX7. ECC83
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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.
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Strong Motorola by TUNG-SOL Long Gray Plate Angled D Getter 12AX7 / ECC83 Tube
Strong Motorola by TUNG-SOL Long Gray Plate Angled D (Foil w 2 dimples) Getter 12AX7 / ECC83 Tube. Great Sounding Tube. Tube passed ALL tests. MINIMUM reading is 70%, NEW (NOS) reading is 100%+ and MAX reading is 130%.
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1960s 12AX7A ECC83 Tung-Sol Tube Gray Long Plate O Getter TV7 Test Good TS7-4
1960’s 12AX7A / ECC83 Tung-Sol Tube. Made In USA. Triode:1 Tested Good : 41/ 32 Baseline. Triode: 2 Tested Good: 43/ 32 Baseline. Top O Getter. NOS tubes fall within the GM range published in the RCA Receiving Tube Manual; variation above/below average is normal.
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1950s 12AX7 ECC83 Tung-Sol Tube Black Plate Square Getter TV7 Test Good TS7-14
1950’s 12AX7 / ECC83 Tung-Sol Tube. Made In USA. Triode:1 Tested Good : 37/ 32 Baseline. Triode: 2 Tested Good: 38/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top Square Getter.
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1960s 12AX7 ECC83 Tung-Sol Tube Gray Long Plate O Getter TV7 Test NOS TS7-6
1960’s 12AX7 / ECC83 Tung-Sol Tube. Made In USA. Triode:1 Tested NOS : 46/ 32 Baseline. Triode: 2 Tested NOS: 47/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top O Getter. No universal test result defines NOS.
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1960s 12AX7 ECC83 Tung-Sol Tube Gray Long Plate O Getter TV7 Test NOS TS7-13
1960’s 12AX7 / ECC83 GAP/R Computor Tube. Made In USA. Triode:1 Tested NOS : 48/ 32 Baseline. Triode: 2 Tested NOS: 50/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top O Getter.
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1960s 12AX7 ECC83 Tung-Sol Tube Gray Long Plate O Getter TV7 Test NOS TS7-11
1960’s 12AX7 / ECC83 GAP/R Computor Tube. Made In USA. Triode:1 Tested NOS : 58/ 32 Baseline. Triode: 2 Tested NOS: 48/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top O Getter.
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1960s 12AX7 ECC83 Tung-Sol Tube Gray Long Plate O Getter TV7 Test NOS TS7-12
1960’s 12AX7 / ECC83 GAP/R Computor Tube. Made In USA. Triode:1 Tested NOS : 46/ 32 Baseline. Triode: 2 Tested NOS: 50/ 32 Baseline. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. Top O Getter.