SYLVANIA6SN7 GTB NOS newSYLVANIA 6SN7 GTB NOS  VERY LOW NOISE PLATINUM MATCHED QUAD*****Sylvania 6SN7 GTB PLATINUM MATCHED QUAD,WITHIN 7 % OR LESS TRIODE-TRIODE & TUBE-TUBE IN TRANSCONDUCTANCE & PLATE CURRENT,VERY LOW NOISE. *****NOS SYLVANIA 6SN7 GTB,GREEN WITH 97-99.5...137.47

SYLVANIA 6SN7 GTB NOS VERY LOW NOISE PLATINUM MATCHED QUAD [Expired]


no longer for sale

*****Sylvania 6SN7 GTB  PLATINUM MATCHED QUAD,WITHIN 7 % OR LESS TRIODE-TRIODE & TUBE-TUBE IN TRANSCONDUCTANCE & PLATE CURRENT,VERY LOW NOISE. *****NOS  SYLVANIA 6SN7 GTB,GREEN WITH 97-99.5% PRINT VISIBLE,"STOCK PHOTO" MORE QUADS AVAILABLE,TIGHT BASES AND VERY CLEAN OCTAL PINS.TUBES WILL BE SUPPLIED IN WHITE BULK BOX.  *****TWICE TESTED.  
 ***** 1st,NO SHORTS,NO GAS AND VERY STRONG TRANSCONDUCTANCE, USING HICKOK TUBE TESTER WHERE 2100/2100 uSIEMENS IS MINIMUM AND NEW START AT 2600/2600 uSIEMENS,WE ONLY SELL TUBES WITH  2700/2700 uSIEMENS OR HIGHER.    
 *****2nd,LIVE AUDIO TESTED ON A MODIFIED DYNA PAS II PREAMP & Tube OTL WITH NO HUM,NON-MICROPHONIC AND NO SPUTTERING. >>>>>Please do not plug tube in a broken equipment just for testing.Returns will be the same state as received.
.  . *****Questions are always welcome, at [email protected] SHIPPING IS BY USPS  REGISTERED MAIL.
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