🏭 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.
Item Tag: NOS Tube
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1960 Westinghouse 6SN7GTB ECC33 Tall Bottle Tubes, Matched Pair, Tested, NOS/NIB
All of these tubes have been tested for transconductance, shorts, gas, leakage and life. These tubes have black ladder plates and halo getters. They have 1960 and 1961 date codes. They have been tested for shorts, gas, and transconductance.
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WESTINGHOUSE 6SN7 GTB TUBE 1963 TOUGH DOGS 2 HOLE GRAY PLATES MATCHING SET NIB
🔥🔥 RARE 1963 WESTINGHOUSE 6SN7GTB “TOUGH DOG” PERFECT MATCHED PAIR 🔥🔥. 🐾 LEGENDARY 2-HOLE PLATES • U.S.A. MADE • 📦 ORIGINAL WESTINGHOUSE BOXES • 🎵 AUDIOPHILE FAVORITE. 🏭 Westinghouse Electric Corporation.
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ZENITH 6SN7 GTB TUBE RED CROWN PREMIUM AUDIO CHROMED HALOS MATCHED QUAD (4) FOUR
If RCA was Chevrolet, Zenith was Cadillac. ✅ Heavy-Duty GTB Construction. 🔥 NOS Zenith 6SN7GTB Matched Quad – Original Zenith Boxes – Premium USA Audio Tubes 🔥. ✅ Genuine USA-Made Zenith 6SN7GTB. ✅ Original Zenith Radionic Tube Boxes.
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RCA 6SN7 GTB TUBE 1968 GLOW TOPS 2 HOLE TOUGH DOGs TALL BOTTLE MATCHING SET NIB
🔥 RCA 6SN7GTB – NOS/NIB – 1968 Date Code BX – Genuine RCA Radiotron 6SN7GTB matched pair 🔥. TOUGH DOGS. 📅 Date Code BX = September 1968 RCA production. TALL BOTTLE. PERFECT MATCHED SET. ✨ Tall bottle construction.
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2, NEW, Westinghouse 6SN7GTB, TALL bottle, 1964, matching pair, 6SN7GT
Two, new in box, Westinghouse 6SN7GTB tubes. Opposing flat, grey plates, TALL bottle, upper halo getter. Outstanding sonics. The 6SN7GTB can be used in all applications calling for the 6SN7GT and 6SN7GTA.
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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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RCA SELECTRON 6SN7 GTB TUBE 1957 TALL BOYS CHROME TOPPED HALO MATCHING SET NIB
Production Year: October 1957. PERFECTLY MATCHED SET. Matched Codes: AE 743. I mark every tube in order to avoid tube rolling! ULTRA RARE HI FIDELITY VALVE. 2 HOLE BLACK LADDERS. Tall Black Base. BEST TUBES ON THE MARKET. NO LEAKS. NO SHORTS.
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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.