✔ 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.
Item Tag: 6SN7 GTB
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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MATCHED PAIR PHILCO (Sylvania made) 6SN7GTB Chrome VACUUM TUBES Tested H.9155
Model 6SN7GTB. Manufacture Date 1957-1958 — Sylvania plant, tube manufactured 1957 or 1958. Condition Tested as NOS. ALL TUBE AUDIO. Minimum Good Value: 50/50.
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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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(2) RCA 6SN7GTB Vacuum Tubes | Long Black Plates | Bottom D Getters. Tube 2 Emissions 86% & 90% | GM 80% & 96%.
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Matched Pair Sylvania Philco 6SN7GTB Black Plates Chrome Domes Tests NOS
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These tubes test 86/86 and 88/88 where a new tube tests 85/85.
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(2) Raytheon 6SN7GTB Tubes Black Plates O Getters. Tested on an Amplitrex AT1000.
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SYLVANIA /6SN7 GTB / TUBE / TESTED / MADE IN UNITED STATES /
This particular tube has been tested and verified for quality and performance.