AMPEREX ECC83 12AX7A TUBE MILITARY SPEC MADE IN USA NEW IN BOX COMES AS PICTURED
Item Tag: VALVES
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GE 6SN7 GTB 1962 WHITE LABEL CHROME SIDED HALO TALL BLACK BASE MATCHING SET
Where 50 ( μ) is Good these tubes peg at 73/77 for Emission. Where 2,600 (ma/V ) is Good these tubes peg at 3,000/3,100 for Mutual Conductance. Mutual Conductance: The 750 is a dynamic mutual conductance tester.
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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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RCA 6SN7 GTB TUBE 1962 TOUGH DOGS 2 HOLE BLACK LADDER PLATES MATCHING SET
Production Year: October 1962 December 1962. TOUGH DOGS. 2 HOLE PLATES. MATCHED SET. Closely Matched Codes: LM LV. I mark every tube in order to avoid tube rolling! EXCL USIVE HIGH FIDELTY TUBE. BEST TUBES ON THE MARKET. NO LEAKS. NO SHORTS.
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RCA 6SN7 GTB TUBE 1950s TOUGH DOGS 2 HOLE BLACK LADDER PLATES MATCHING SET
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.
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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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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.