Production Year: 1950s. TOUGH DOGS. 2 HOLE PLATES. MATCHED SET. Closely Matched Codes: KC L#. I mark every tube in order to avoid tube rolling! EXCL USIVE HIGH FIDELTY TUBE. BEST TUBES ON THE MARKET. NO LEAKS. NO SHORTS.
Item Tag: 6SN7
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GE 6SN7 GTB 1960s CHROME SIDED HALO TALL BLACK BASE PERFECT MATCHED SET NIB
Production Year: 1960s. (Original GE Boxes). Mutual Conductance: The 750 is a dynamic mutual conductance tester. This is a more sophisticated test than a basic emission only test, which only checks the cathode’s ability to emit electrons (super heated).
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SYLVANIA 6SN7 GTB 1968 GREEN LABEL BLACK BASE CHROME TOPPED FOIL MATCHED SET NIB
🏭 Manufactured by Sylvania in Emporium, Pennsylvania during the 12th week March of 1968. ✨ Sylvania factory boxes are included. PERFECT MATCHED SET. 📅 42 = internal lot, tooling, shift, or inspector designation.
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SYLVANIA 6SN7 GTB TUBE 1965 GREEN LABEL BLACK BASE CHROME TOP FOIL MATCHED SET
✨ Sylvania factory boxes are included. PERFECT MATCHED SET. Mutual Conductance: The 750 is a dynamic mutual conductance tester. This is a more sophisticated test than a basic emission only test, which only checks the cathode’s ability to emit electrons (super heated).
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NOS Pair GE 6SN7 GTB CHROME SIDED
Pair of Closely Matched GE 6SN7GTB Twin Triodes. Tested on Daniel Nelson Calibrated TV7/U. Tube 1: 102/107 Tube 2: 102/117 minimum is 50.
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SYLVANIA 6SN7 GTB TUBE 1968 GREEN LABEL BLACK BASE CHROME TOP FOIL MATCHED SET
🏭 Manufactured by Sylvania in Emporium, Pennsylvania during the 12th week March of 1968. ✨ Sylvania factory boxes are included. PERFECT MATCHED SET. 📅 42 = internal lot, tooling, shift, or inspector designation.
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Pair 1957 GE Side Getter 6SN7GTB Tubes STRONG! 6SN7
Pair 1956 GE Side Getter 6SN7GTB Tubes. These tubes test 90/90 and 85/85 where a new tube tests 85/85.
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Matched Pair 1958 GE Side Getter 6SN7GTB Tubes STRONG! 6SN7
Matched Pair 1958 GE Side Getter 6SN7GTB Tubes. These tubes test 85/85 where a new tube tests 85/85.
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Pair RCA 6SN7GTB short glass Black Plate Tubes Balanced STRONG 6SN7
PairRCA 6SN7GTB. Black Plate Balanced Tubes. These tubes test 85/85 and 90/90where a new tube tests 85/85.
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SYLVANIA 6SN7 GTB TUBE 1968 CHROME TOP HALO BLACK V PLATES MATCHED SET
Rare late-1968 Sylvania production featuring the highly sought-after PERFECT MATCHED SET. BLACK V PLATES. Matched Codes: 6844 AKL. EXCL USIVE HIGH FIDELTY TUBE. ✅ Strong Matching Pair. Production Year: Emporium, PA – 1968.