GE 7591A tube. (DS, EL34 box).
Item Tag: 7591A
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(4) Ultron 7868 Tube NIB USA Tip Top For Fisher 400 Or 500c 7591A With Converter
For type 7591A tubes with proper adapters. (4) 7868 tube Near MINT. Our TV7 does not have settings for 7868. We are able to use adapter and 7591 settings to test them. All Tested as 70 while minimum is 36.
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1 x National Electronics 7591A tube, Tested Excellent !
Ip # 36 on Maxi Matcher tube tester. ( Tube tester not included ).
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1x NOS GE USA 7591A Vintage Power Tube / w/ OE Box Classic / Several in Stock
Introduced in 1963, the legendary 7591a was an improved design w/ better screen dissipation and a low-loss base. warm rich sound reproduction w/ grey plate internals, live-concert holographic sound reproduction w/ vinyl style intimacy.
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TWO Amperex 7591A Tubes / Amplitrex Tested STRONG 💪 +100% / Within 2% Gm Match
TWO Amperex 7591A vacuum tubes. Tested on Amplitrex AT-1000 tube tester (fixed bias mode). Tubes test at 10770 and 10600 where 6630 micromhos is pass/fail grade. +100% gm test results / matched within 2%.
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CMI Sylvania 7591 7591A NOS Excellent Testing Values Tightly Matched Pair
These tubes are carefully tested on my TV-7D/U at 60-64/36 min good (55-56=100%). They sound wonderful in my hifi system. Super rare and hard to find now. What you see is what you get.
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TWO McIntosh 7591A Tubes / B&K Tested Approx 80% / Good Close Pair
Good pair of used 7591 tubes from a McIntosh MA230. B&K Tested. Austin Stereo has over 45 years of experience with tube audio.
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TWO Amperex 7591A Tubes / Amplitrex Tested / 1978 World Globe Logo
TWO Amperex 7591A vacuum tubes. Tested on Amplitrex AT-1000 tube tester (fixed bias mode). Tubes test at 9550 and 9800 where 6630 micromhos is pass/fail grade. No rattle / tight base / no loose parts.
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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