The tube was carefully tested on my TV-7D/U as shown in the photos with 36 min good (55-56=100%). It sounded wonderful on my hifi system with other 3 new tubes. Super rare and hard to find now.
Item Tag: 7591
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Mixed Brands Sylvania Hammond 7591 7591A Excellent Values One Tube Price
The tube was carefully tested on my TV-7D/U as shown in the photos with 36 min good (55-56=100%). They all sound wonderful on my hifi system. Super rare and hard to find now.
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(4) 7591 Sylvania U.S.A. Sansui Fisher Output vacuum tube valve
This item are 4tubes7591A Sylvania Made in U.S.A. Test result 70-75 min 36. Grey plate, O-Getter, Coin base, no original box. Used tubes.
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7591A GE brand International Coin Base Halo Getter Tested Pair Tubes Made in USA
Tested with AMPLITREX AT-1000 Tube tester MADE IN USA. Other test made Reboxed in our custom white box. Closing adhesive tape in brown paper – ECO-KRAFT. Brown paper sealing tape – ECO-KRAFT. TEST RESULT: VERY STRONG.
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Sylvania 7591 7591A Excellent Testing Values Matched Quad
The tube was carefully tested on my TV-7D/U at 68-70-70-72/36 min good (55-56=100%). They all sound wonderful on my hifi system. Super rare and hard to find now.
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Sylvania 7591 7591A NOS Excellent Testing Values Red Prints
You are bidding for 1 Sylvania 7591 7591A NOS Excellent Testing Values Red Prints. The tube was carefully tested on my TV-7D/U at 70/36 min good (55-56=100%). It sounds wonderful on my hifi system with other new tubes. Super rare and hard to find now. What you see is what you get. Please look at the photos carefully before bidding. I am willing to answer any question Return is accepted if you pay for the returning fees. Thanks P/S: The shipping fees in the listing is by regular mail (normally Vietnam post) taking from 12-25 days depending on buyers' local customs. To some regions, it can take even longer than that. Besides, Vietnam post is not always available to some countries in South America, Northern Europe or Africa. Please ask me before paying. If you want to use express shipping services like DHL, Fedex or UPS express taking 3-7 working days, you have to pay an extra of around $68.75. (For order over $1000, Express shipping service is a must. Please wait for the invoice to pay). Please let me know so that I can send you an invoice. If the item(s) purchased may not arrive or faulty, please don't hesitate to contact me before opening cases on ebay. I am willing to reach to a solution and make you completely satisfied. Thanks a million. Ok
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Pair 7591A SYLVANIA labeled for HAMMOND Halo Getter Tubes Amplitrex Test
Both tubes tested and matched on an amplitrex AT1000 tube tester with the following results Tube 1- 64% emissions 70% gm Tube 2- 82% emissions 83% gm
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Tung-Sol 7591 Made in USA by Sylvania Matched Pair NOS Tubes Boxes Tested TV-7
Matched pair of Tung-Sol 7591 power tubes. Tube markings: TUNG-SOL 7591 MADE IN U.S.A. 3226232-3. Gray plates, top getter, smoked glass, black base. Dealer notations and date codes indicate 1962 production.
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Tung-Sol 7591 Power Vacuum Tube USA Amplitrex Tested Strong 74% Gm
Tested strong on an amplitrex AT1000 tube tester at 68% emissions and 74% gm