1955TESTED NEW / NOS / NIBTHE FISHER BRAND TUBE ( BY SYLVANIA - Manufacture/Date Code=312/526)7591 / 7591A TUBE (for Eico McIntosh Fisher Scott) Audio Tube AMP Amplifier TV-7/u Tested Priced to sell! Good MEASUREMENTS across all 6 Tv-7/u Tube testers!!!! Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Military Calibrated Hickok TV-7/U Testers: TUBEs TEST RESULTs: TUBE: 72 - {Minimum Rating of 36 for TV-7 Testers are equal to 65% of average new ratings.} *** I WILL COMBINE SHIPPING COSTs ON MY ITEMS FOR SALE - SAVE BIG $$ !!! If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE AND ARE MOSTLY STRONG TUBES! I Combine ShippingBefore You Pay. I accept PayPal and Postal M O.Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. ANY RETURN WILL BE ACCEPTED BUT BUYER WILL PAY SHIPPING FEES AND I WILL NOT REFUND ANY SHIPPING FEES.*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me. My Return Policy: Will not accept returns for reasons such as ordered the wrong item, change mind, not what I thought It was, wrong color ordered, item ordered.

SYLVANIA 7591A TUBE. Emissions at 103 on Sencore tube tester. No shorts. Grid leakage in good range. Tight base, no rattle. As is in pictures.

CALIBRATED TV7 TESTED AT A VERY STRONG 62 WITH 36 BEING MINIMUM. CODES ANP GF . JUST BECAUSE THERE IS A BOX I DONT ASSUME A TUBE IS NEW. THIS ONE IS SUPER CLEAN AND SUPER STRONG SO I FEEL CONFIDENT CALLING IT NEW. I TAKE RETURNS FOR ANY REASON [SEE BELOW ] TUBE QUALITY IS SUBJECTIVE. I DO MY BEST TO CONVEY WHAT I KNOW AND NOT GUESS ABOUT WHAT I DONT KNOW. I HAVE SEEN VARIATIONS IN READINGS DEPENDING ON HOW LONG I LEAVE IT IN THE TESTER TO HEAT UP OR HOW CLEAN THE PINS ARE. I TAKE RETURNS FOR ANY REASON , EVEN IF YOU JUST DONT LIKE THE WAY IT SOUNDS. PLEASE CONTACT ME FIRST AND ALLOW ME A COUPLE DAYS TO ADDRESS YOUR ISSUE BEFORE YOU ENLIST EBAY. I HAVE OTHER TUBES LISTED . I WILL COMBINE SHIPPING. I WILL ONLY ASK FOR ONE SHIPPING CHARGE HOWEVER MANY TUBES BOUGHT. IF YOU ACCIDENTALLY PAY THE EBAY GENERATED INVOICE I WILL REFUND ANY OVERCHARGE.

CALIBRATED TV7 TESTED AT 48 & 50 WITH 36 BEING MINIMUM. CODES FB . THEY COME WITH BOXES AND APPEAR IN GOOD SHAPE BUT I CANT PROMISE WHAT THAT MEANS. JUDGE FOR YOURSELF AND RETURNS ARE FREE [ SEE BELOW ] TUBE QUALITY IS SUBJECTIVE. I DO MY BEST TO CONVEY WHAT I KNOW AND NOT GUESS ABOUT WHAT I DONT KNOW. I HAVE SEEN VARIATIONS IN READINGS DEPENDING ON HOW LONG I LEAVE IT IN THE TESTER TO HEAT UP OR HOW CLEAN THE PINS ARE. I TAKE RETURNS FOR ANY REASON , EVEN IF YOU JUST DONT LIKE THE WAY IT SOUNDS. PLEASE CONTACT ME FIRST AND ALLOW ME A COUPLE DAYS TO ADDRESS YOUR ISSUE BEFORE YOU ENLIST EBAY. I HAVE OTHER TUBES LISTED . I WILL COMBINE SHIPPING. I WILL ONLY ASK FOR ONE SHIPPING CHARGE HOWEVER MANY TUBES BOUGHT. IF YOU ACCIDENTALLY PAY THE EBAY GENERATED INVOICE I WILL REFUND ANY OVERCHARGE.