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Item Tag: SYLVANIA

  • 6SN7 GTB NOS SYLVANIA YELLOW LABEL PLATINUM MATCHED PAIR SHORT BOTTLE TV7

    *****SELLING WORLDWIDE******NOS PLATINUM MATCHED PAIR triode-triode & tube-tube in transconductance & plate current)>>>> PAIR SYLVANIA 6SN7GTB,NOS,SHORT BOTTLE,YELLOW Label.”STOCK PHOTO”.97-99%% Label Visible,US MADE.Tubes will be supplied in new Sylvania box.BLACK T-PLATES,WE HAVE ENOUGH TO GIVE A PLATINUM MATCHED TUBES,CLEAN OCTAL PINS,TIGHT BASE.**** TWICE TESTED. *****1st)NO SHORTS,NO GAS AND WELL-BALANCED TRIODES IN TRANSCONDUCTANCE AND PLATE CURRENT(PLATINUM MATCHED) USING HICKOK TUBE TESTER *****2nd)TUBES ARE NOT USABLE UNLESS THEY ARE LIVE AUDIO TESTED WITH NO HUM & NON-MICROPHONIC,TESTED USING MODIFIED DYNACO PAS 3 & TUBE OTL. Having a minimum of, TUBE1) 92/94 & 10.0/10.2 ma TUBE2) 92/96 & 9.9/10.2 ma uSIEMENS /PLATE CURRENT Where 50/50 is minimum,which is 65% of NOS & NOS/100% start at 77/77 with newly calibrated TV7 TUBE TESTER. *****TUBES WITHOUT TEST DATA IS NOT WISE DECISION AND LISTING ADS THAT SAY’S “test good”OR “test strong” WITH HIDDEN TEST RESULTS IN VACUUM TUBES IS NOT ENOUGH AND AVOID SURPRISES.****BEWARE OF SOME CLONED/FAKE SYLVANIA 6SN7’S. *****WE DO COMBINE SHIPPING ****** MY WORLDWIDE SHIPPING IS ACTUAL USPS REGISTERED MAIL. ******PLEASE CHECK MY OTHER COOL AUDIO STUFF.. *****QUESTIONS ARE ALWAYS WELCOME.

  • Matched Pair Sylvania 6SN7GTB Black Plate Chrome Dome Tested Like NOS Tube

  • 4 x 6SN7gtb Sylvania/Philco Tubes*Chrome Dome*Very Strong Quad*1950s*#17

    4 x 6SN7gtb Sylvania Tubes. Made in USA for Philco. Tested on Enhanced Triplet E3444 Laboratory Tester. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.

  • 6-SYLVANIA 6SN7GTB Twin Triode Chrome Top! Black Plate! HICKOK TEST GREAT!

    These tubes have black plates and top halo getters with excellent silver getter flashing on each tube. The tubes have production codes as follows:6-13, 413, 322308, 626 and 552. Mutual Conductance test readings are as follows: 2300/2000, 1650/2150, 2150/1800, 2450/2600, 2350/2250 and 2350/2350.

  • 6SN7GTB Sylvania radio audio amplifier vacuum tubes 2 valves tested 6SN7GT 6SN7

    Tubes tests.

  • SYLVANIA 6SN7 GTB TUBE 1951 CHROME TOPPED HALO BLACK PLATES MATCHING SET

    ✔ Custom 6SN7 platforms. 🔥 Genuine U.S.A. Sylvania manufacture. MATCHED SET. BLACK V PLATES. Production Year: 1951. EXCL USIVE HIGH FIDELTY TUBE. 🔥 Matching pair. 🔥 Black plate construction.

  • 6SN7 GTB SYLVANIA NOS PLATINUM MATCHED PAIR

    *****SELLING WORLWIDE*****>>>>SYLVANIA 6SN7 GTB,NOS,PLATINUM MATCHED PAIR (well-balanced triode-triode & tube-tube in transconductance & plate current).Label print size may differ, 97-99% GREEN PRINT VISIBLE.We have enough collection to supply PLATINUM MATCHED tubes.>>>>>TUBES ARE “STOCK PHOTO”. SUPPLIED IN Sylvania BOX. TESTED TWICE,*****1st) NO SHORTS,NO GAS AND WELL-BALANCED TRIODES IN TRANSCONDUCTANCE & PLATE CURRENT(PLATINUM MATCHING).WITH HICKOK TUBE TESTER WHERE 2100/2100 uSIEMENS IS MINIMUM. *****2nd) TUBES ARE NOT USABLE UNLESS THEY ARE LIVE AUDIO TESTED WITH NO HUM & NON-MICROPHONIC.TESTED USING MODIFIED DYNACO PAS 3 & TUBE OTL. Having a minimum of, TUBE1)2850/2950 uSIEMENS & 8.1/8.5 ma TUBE2)2800/2900 uSIEMENS & 8.1/8.2 ma plate current.WHERE 2100/2100 IS minimum AND NOS START AT 2600/2600 uSIEMENS WITH HICKOK TEST. *****TUBES WITHOUT TEST RESULT IS NOT SOUND DECISION & LISTING ADS THAT SAY’S “NOS”,”test good” or “test strong” IN VACUUM TUBES IS NOT ENOUGH AND AVOID SURPRISES. ****** INTERNATIONAL SHIPPING IS ACTUAL USPS SHIPPING RATES.*****BEWARE OF CLONED/FAKE RUSSIAN MADE SYLVANIA 6SN7’S. ******PLEASE CHECK MY OTHER COOL AUDIO STUFF. *****QUESTIONS ARE ALWAYS WELCOME.

  • 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).

  • Sylvania 6SN7GTB Chrome Dome Vacuum Tube USA Tested 3900/3700

    Sylvania 6SN7GTB. Recorded results: 3900 / 3700. You will receive the exact tube and marked storage bag pictured.

  • 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.