One pair of 7591A Electro-harmonix Valves/Tubes. These have never been used,they were spares for a Roland Bolt 30 watt amplifier. The amplifier was sold some years years ago, so unfortunately I cant test them.

Used Hammond Organ doners from same amp

You are bidding on (5) NOS NIB to Strong 7591s + (1) Free Extra Audio Tubes, I Combine Shipping! Thanks and Good luck bidding. *We can ship for a cheaper price first class international, just ask when you win the item. Usually it is about half of what priority is. We like Priority because of how reliable it is.

You are bidding on (5) NOS NIB to Strong 7591s + (1) Free Extra Audio Tubes, I Combine Shipping! Thanks and Good luck bidding. *We can ship for a cheaper price first class international, just ask when you win the item. Usually it is about half of what priority is. We like Priority because of how reliable it is.

I have 1 new in the box rca 7591a tube.This tube test 102 where 70 is the minimum good and new tubes test 100 on my sencore tc-162 tube tester.I have tested this tube for shorts grid leakage gas life etc.

PAIR HAMMOND PRE OWNED 7591A VACUUM TUBES TEST STRONG. WE USUALLY SHIP WITHIN 10 BUISNESS DAYS. (NO WEEKENDS) PLEASE SEE YOUR ESTIMATED DELIVERY DATE.

Vintage 1960 Sylvania USA Hammond 7591A Vacuum Tube. Branded as Hammond but with Sylvania USA manufacturing code (312). Manufactured the 13th week of 1960. Although it’s used it tested well above minimum new spec (56) on my TV-7. This tested at 68. As you may know, organ tubes were selected for their low noise floor so this is one of the best. Guaranteed good. Returns accepted. No box. Thanks!

PAIR HAMMOND PRE OWNED 7591A VACUUM TUBES TEST STRONG. WE USUALLY SHIP WITHIN 10 BUISNESS DAYS. (NO WEEKENDS) PLEASE SEE YOUR ESTIMATED DELIVERY DATE.

I have 1 Excellent strong Rca 7591a tube.This tube test 64 where 36 is minimum good and new tubes test 66 to 68 on my tv7 tube tester

Two, new in box, Tung Sol 7591 tubes. These are obviously, vintage, US made Tung Sol brand tubes and not the modern day, Russian made, re-issue/reproduction Tung Sol tubes. While the tubes are branded Tung Sol (USA), they were actually manufactured by Westinghouse, the originator of the 7591 tube type. This is evidenced by inspection of the structure and most importantly, by the etched 7591 designator at the top of the bulb and the unique, Westinghouse only, dot matrix date code. Grey plates, halo getter. Tested on a Hickok TV-3 military tester that has been calibrated, just to make sure. Firm bases, excellent silvering. Tubes are matched for dynamic gain and structure, testing at 8250, 8250 where pass/fail is 4250 micromho. The have the same structure inside and out, having printed date codes of 322NR3 and 322NB3, early and late in 1960. Many other lots of tubes for sale this week. Shipping is free within the continental US. Elsewhere- exact postage only, no packing fee.

I have 1 Rare excellent westinghouse 7591a / 7591 tube .This tube test 50 where 36 is the minimum good and new tubes test 66 to 68 on are calibrated tv7d/u tube tester.

I have 2 Rare excellent westinghouse 7591a / 7591 tubes .These tubes test 58 and 58 where 36 is the minimum good and new tubes test 66 to 68 on are calibrated tv7d/u tube tester.

I have 1 excellent westinghouse 7591a tube labeled for Lowery organs .This tube test 61 where 36 is the minimum good and new tubes test 66 to 68 on are calibrated tv7d/u tube tester.

I have 1 excellent sylvania 7591a tube labeled for Fisher .This tube test 65 where 36 is the minimum good and new tubes test 66 to 68 on are calibrated tv7d/u tube tester.

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.

I have 1 Excellent Sounding sylvania 7591a tube.This tube test 43 where 36 is the minimum good on my tv7d/u tube tester.

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.