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: United States
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Sylvania 7591 7591A Used Good Testing Values Red Prints
The tube was carefully tested on my TV-7D/U at 52/36 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.
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Lowrey 7591 7591A Fat Base Copper Plates NOS Excellent Testing Values
You are bidding for 1 tube Lowrey 7591 fat base copper plates NOS Excellent Testing Values. The tube was carefully tested on my TV-7D/U at 68/36 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.
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RARE Westinghouse 6013 WL7611 Electronic Tube
This is a large for display only electronic tube. I’ve never seen anything like this. Comes with a cover. 14 inches long!
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TWO McIntosh 7591A Tubes / Amplitrex Tested /Strong Plate Current/Close Gm Match
TWO McIntosh 7591A vacuum tubes. Tested on Amplitrex AT-1000 tube tester (fixed bias mode). 85.6% / 86.8% gm mutual conductance. Tubes test at 8740 and 8860 where 6630 micromhos is pass/fail grade. Tube 1: 8740 micromhos @ 60.6mA plate current emissions.
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Vintage RCA 7591A Vacuum Tube | NOS | Black Plate | Made in USA | Rare Hi-Fi…
This is a premium vintage RCA 7591A power pentode, highly sought after for the legendary Fisher 500C, 800C, and McIntosh amplifiers. Condition: Beautiful New Old Stock (NOS) appearance. Crystal clear glass with a strong mirror-like getter. Design: Features the superior Black Plate construction. Testing: Visual inspection only; sold untested/as-is. This is a high-value piece of audio history. It will be professionally packed, double-boxed, and insured for shipping.
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GE General Electric 7591A Vacuum Tube : Coin Base
GE General Electric 7591A Vacuum Tube. Up for sale is a GE General Electric 7591A Vacuum Tube. Model : 7591A ( Coin Base/O-Getter ). I tested tubes on my TV7B/U tube tester. Test Results : Tube 1 – 47.