Model 6SN7GTB. Condition Tested. Manufacture Date BFZ = February 1962, BGY = February 1963 — Emporium, PA plant. ALL TUBE AUDIO. Minimum Good Value: 50/50.
Item Tag: SYLVANIA
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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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(2) Sylvania Philco 6SN7GTB Tubes Chrome Dome 3 Hole Black Plate Test Strong
Tube 1 Emissions 103% & 92% | GM 88% & 88%.
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Sylvania 6SN7 GTB Pair
Up for sale is a pair of Sylvania 6SN7 GTB tubes. They test great and are a close match.
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SYLVANIA 6SN7 GTB TUBE 1959 CHROME TOPPED HALO BLACK PLATES MATCHING SET
✔ Custom 6SN7 platforms. 🔥 Genuine U.S.A. Sylvania manufacture (EIA 312). 🔥 Date coded 312-939 (39th week of 1959). MATCHED SET. BLACK V PLATES. 🔥 Matched pair. EXCL USIVE HIGH FIDELTY TUBE. Production Year: Emporium, PA – September 1959.
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SYLVANIA 6SN7 GTB TUBE 1959 CHROME TOPPED HALO BLACK PLATES MATCHING SET
✔ Custom 6SN7 platforms. 🔥 Genuine U.S.A. Sylvania manufacture (EIA 312). 🔥 Date coded 312-939 (39th week of 1959). MATCHED SET. BLACK V PLATES. 🔥 Matched pair. EXCL USIVE HIGH FIDELTY TUBE. Production Year: Emporium, PA – September 1959.
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(2) Sylvania 6SN7GTB Chrome Dome 3 Hole Black Plate Late 1950s Tests Strong
Tube 1 Emissions 91% & 95% | GM 103% & 103%. Tube 2 Emissions 87% & 112% | GM 107% & 100%.
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Sylvania 6SN7GTB NOS/NIB vacuum tubes matched & guaranteed identical codes
Sylvania NOS 6SN7GTB Vacuum Tubes. For sale I have an exceptional matched pair of new in original box Sylvania coin base 6SN7GTB vacuum tubes. I really like these 1960 production GTBs. Linear with excellent noise characteristics.
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SYLVANIA 6SN7 GTB 1977 TUBE 2 HOLE TOUGH DOG FOIL GETTER MATCHED SET NIB
Matched Codes: KC. LEGENDARY TOUGH DOGS. I mark every tube in order to avoid tube rolling! 2 HOLE BOXED T PLATES. PERFECT MATCHING SET. EXCL USIVE HIGH FIDELTY TUBE. Tall Black Base. BEST TUBES ON THE MARKET. NO LEAKS. NO SHORTS.
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MATCHED PAIR SYLVANIA 6SN7GTB Chrome Dome VINTAGE Vacuum Tubes TESTED H.9153
Model 6SN7GTB. Condition Tested. ALL TUBE AUDIO. Minimum Good Value: 50/50.