Description

<> Historic TubeMuseum, Tuxedo Park, New York Established in 1928 as a premier research facility in Tuxedo Park, New York, that attracted such brilliant and most visionary minds of the twentieth century - Albert Einstein, Werner Heisenberg, James Franck, Niels Bohr and Enrico Fermi to name a few. The Tuxedo Park lab attracted these top-flight scientists who experimented with audio, sound, time measurement, and radar (first klystron tube). Welcome to the ... Historic TubeMuseum, Tuxedo Park, New York - and Sarasota Florida TUBE MUSEUM NEW YORK SYLVANIA J.A.N. GB-6005 "BLACK-GLASS" Phenomenal TUBES! phe·nom·e·nal / fəˈnämənəl 1. Very remarkable; extraordinary. 2. Perceptible by the senses or through immediate experience. FEEDBACK SCHWARZ-GLAS Elektronenröhre SELTENE NOS-TROPHY QUALITÄT RARE NOS TROPHY-QUALITY SYLVANIA GOLD BRAND REAL GOLD PINS NOT JUST A 6AQ5, BUT A WHOLE NEW EXPERIENCE IN ENHANCED SOUND! Gold pins never tarnish or need to be "scaled or cleaned" like plain steel pins! In terms of chemical properties, pure gold plating is known for its resistance to corrosion and oxidation . It can also be used in high-temperature applications and is the best for electrical conductivity. REAL GOLD PINS NOS SYLVANIA U.S.A. GB-6005 = 6AQ5W BEAM POWER TUBES MILITARY VERSION OF 6AQ5W "BLACK-GLASS" BLACK PLATES! MILITARY "J.A.N." GB-6005 PERFECT MATCHED PAIR Pristine Tubes in their Original Boxes! LAST REMAINING REAL NOS SURVIVORS MILITARY J.A.N. "BLACK-GLASS" RARE GB-6005 MATCHED PAIR THE "PERFECT" 6005 / 6AQ5W TUBES PERFECT MATCHED PAIR! Manufactured by Sylvania Electric for THE UNITED STATES AIR FORCE IS BLACK-GLASS BETTER? ..."The coating on the plates is used to dissipate heat from the tube components. At one point it was only made with nickel making the finished color black, during WWII once nickel became short, aluminum was used instead making the finished color dark grey. This became the adopted manufacturing process until the early 1950's or so. So, as you say the plate color gives us a a good marker of when the tube was made, rather than a direct indication of the sound quality. Since the black plate process is older, those tubes are becoming more scarce, so more costly.".. Ask yourself this question: Why should I buy to from sellers who don't even test or show you the real test results? IN ADDITION: These tubes are individually sound-auditioned in our preamp to guarantee perfect performance Why buy to from sellers who don't even test or show you the real test results? Select Premium Audio Tubes /Valves You will never find such TIGHTLY Balanced & Matched TRIODE tube PAIR with such Matching mA/V (Gm) anywhere again! PERFECT BALANCED MATCHED PAIRS: PAIR 1: Tube 1: 45,8mA (101%) 4,270 (104%) GM WOW! Tube 2: 45.0mA (100%) 4,300 (104%) GM WOW! - RARE NOS TROPHY-QUALITY - SYLVANIA GOLD BRAND - GOLD PINS You will never find such TIGHTLY Balanced & Matched TRIODE tube PAIR with such Matching mA/V (Gm) anywhere again! Elektronenröhre ... SELTENE NOS-TROPHY-QUALITÄT RARE NOS TROPHY-QUALITY THESE ARE GENUINE NOS SYLVANIA USA TUBES THE LAST REMAINING NOS SURVIVORS RARE NOS TROPHY-QUALITY Impossible to find in NOS except from The Tube Museum here! You will never find such TIGHTLY Balanced & Matched TRIODE tube with such Matching mA/V (Gm) anywhere again! TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that possibly can be. Low-Noise Tested Microphonic Free No H-to-K Leakage (Heater-to-Cathode) No leaks (0) zero! You would be surprised how many tubes are "sold elsewhere with unreported and hidden" Heater-to-Cathode leaks! Any H-to-K leak will prevent a tube from reaching it correct operating point and could damage your preamp, so be sure and secure with Tube Museum Tested Tubes! TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be. Terms of Auction Domestic & International Buyer's Terms of Auction International Buyers - Please note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. We do not low declare and we insure for full value. Per eBay's terms of service which every eBay account holder must agree to as part of being an eBay member, a bid is a legally binding contract. Please read the Terms & Conditions carefully before bidding. By bidding on this auction, you understand and agree to eBay's terms of service as well as all terms and conditions mentioned here. Buyer pays all shipping, Item must be in original condition including cosmetic lettering on tubes so handle with white-glove care, un-used with all original boxes, packing material, environmentally safe cornstarch pellets, and shipping box. ALL RETURNS subject to a 10% handling charge. Absolutely NO RETURNS on special orders or best-offer deals. All sales are final with NO RETURNS on self installed mic tubes. All exchanges must be pre-paid and returned in original packing, complete with no sign of wear or abuse, exactly the same condition as it was when you received it. In the event that the product is not in the same condition, and does not test the same as you received it, you will be subject to a refusal and return, a determined restocking fee, repair charge, or disqualification. RETURN AUTHORIZATION (RA) number and instructions is required before sending any items. Shipping and handling charges are non-refundable. We do not guarantee that your tester, or your tester's measurements will be the same as the Amplitrex AT-1000. Older testers, different testers, or the same tester may report different test measurements, and may not measure the same tube meaningfully (due to current dependency), accurately (due to calibration difficulties) or consistently (due to internal circuit drift) There is no warranty or returns based on what any other tube tester reports. THE COST OF ALL USA SHIPPING INCLUDES INSURANCE, TRACKING NUMBER AND DELIVERY CONFIRMATION We do not low declare and we insure for full value. International Buyers - Please note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. Please SEE my other ebay Auctions : Visit this seller's eBay Store! TUBE MUSEUM NEW YORK REAL NOS Sylvania "BLACK-GLASS" Phenomenal TUBES! phe·nom·e·nal / fəˈnämənəl 1. Very remarkable; extraordinary. 2. Perceptible by the senses or through immediate experience. NOTICE: All text & images © 2002-2024 Copyright © of The Tube Museum New York © All Rights Reserved By entering this site you are agreeing to be bound by the terms of this agreement. All photographs and text appearing in the Tube Museum New York (TubeMuseumUSA) site(s) are the exclusive property of The Tube Museum New York © (except where stated otherwise) and are protected under international copyright laws and treaties. They are made available for your personal viewing enjoyment only. No images or unique text are within the Public Domain. The photographs and text may not be copied, reproduced, redistributed, manipulated, projected, used, or altered in any way without the prior express written permission of The Tube Museum New York ©. The unauthorized reproduction or distribution of a copyrighted work, pictures, and text is illegal. 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