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 ...TUBEMUSEUM NEW YORK ACTUAL FEEDBACK ABOUT THESE PHENOMENAL 6AU6's: FEEDBACKFEEDBACKFROMWHENGreat transaction NOS SONY OEM LOW-NOISE 6AU6 Tube for SONY C800G C37A Altec 21 WARM Audio WA-8000 (#235053132388)Buyer: shawndau84 (146)US $339.84Verified purchasePast month Great seller. Packaged with great care and arrived quickly. As described. Beautiful. My microphone's noise floor dropped 20% and their gain increased! great tube! very low noise in my c37a A 5star vender. Good as gold. 👍👍👍. Delivered 3 days earlier than estimate A+++ Seller! The tubes are every bit as great as I have read about! Thank you! Superb company, amazing customer service and great quality products. A*+ 101%!!! Im a very critical tube buyer. These are actual NOS vintage tubes. Thanks!! Outstanding quality Thank you. PRICE is EACH! Bid 2 for 2 tubes, 4 for 4... NOS TUBE MUSEUM QUALITYSONY O.E.M.6AU6 = EF94"GOLD-GRID" VERSIONfor SUPERIOR PERFORMANCESONY's ORIGINAL EQUIPTMENT MAUFACTURER PICTURES OF THE ACTUAL NOS GOLD-GRID TUBE(S) YOU WILL RECEIVETUBE 1: AMPLITREX TESTED @ 5,500 (125%) AVAILABLE! TUBE 2: AMPLITREX TESTED @ 5,400 (122%) AVAILABLE!TUBE 3: AMPLITREX TESTED @ 5,000 (113%) AVAILABLE! TUBE 4: AMPLITREX TESTED @ 4,900 (111%) AVAILABLE! TUBE 5: AMPLITREX TESTED @ 4,900 (111%) AVAILABLE!TUBE 6: AMPLITREX TESTED @ 4,900 (111%) AVAILABLE! 6AU6 = EF94 "GOLD-GRID" VERSIONPICTURES OF THE ACTUAL NOS GOLD-GRID TUBE(S) YOU WILL RECEIVEfor SUPERIOR ELECTRICAL PERFORMANCE LOW-NOISE AMPLITREX DIGITALLY TESTED O.E.M. AVAILABLE NOW! LIMITED QUANTITIES! NOS 6AU6 Tube for Sony C800G, C37A, and Altec 21 Warm Audio WA-8000 PRICE is EACH! Bid 1 for 1 tube A tad longer than a the Diamond Telefunken 6AU6. The length of the tube is insignificant, it's the tube's performance that matters.6AU6 SAME AS SONY OEM LOW-NOISE AMPLITREX DIGITALLY TESTED microphone quality 6AU6 Tube for Sony C37A and Altec 21. "GOLD-GRID" VERSIONfor SUPERIOR PERFORMANCEBRILLIANT CLEAN NOS WITH RHODIUM PINS AND OUTSTANDING MATCHED RESULTS. PICTURES OF THE ACTUAL NOS TUBE(S) YOU WILL RECEIVEBEAUTIFUL NOS IN WHITE BOX. NO MORE SONY BOXES LEFT! * THESE TUBES LABELLED TELEFUNKEN & SIEMENS NOT FOR SALE AND NOT AVAILABLE!These are the highest quality 6AU6 tubes, such high quality that in the 1970's ...* TELEFUNKEN and SIEMENS of WEST GERMANY sourced & labeled these EXACT SAME tubes as their own! The picture above shows you this fact! "GOLD-GRID" VERSIONfor SUPERIOR PERFORMANCE Recommended for: McIntosh Tuners & Microphones - Schoeps CM61 mic -Sony C37A and Altec 21 - C800G Sony mic - C37A Sony mic - McIntosh Model MR FM Tuners: MA 6 Multiplex adapter for MR66 x 1 tube MR 55 Tube. AM-FM Mono. x 3 tubes MR 55A Tube. AM-FM Mono. x 4 tubes. MR 65 Tube. Mono. x 4 tubes MR 65B Tube. FM tuner Stereo. x 4 tubes MR 66 Tube. Mono/stereo. x 4 tubes MR 67 Tube FM tuner. Stereo. x 3 tubes MR 71 Tube. FM Stereo. x 4 tubes Note: COMPARISION OF THE SAME IDENTICLE TUBE BEING OFFERED - TELEFUNKEN-SIEMENS 6AU6 vs. SIEMENS 6AU6 - ARE THE SAME IDENTICAL TUBE! The Telefunken labeled tube pair is displayed for historical purposes only and NOT included in this sale, but were available at one time way back when. These are the highest quality 6AU6 tubes, such high quality that in the 1970's Telefunken and SIEMENS of Western Germany, sourced & labeled these tubes as their own! Telefunken would not have put their name on these tubes, if they were not the best possible highest quality tubes!. The Telefunken and Siemens labeled tubes are displayed for historical purposes only and NOT included in sale! 6AU6=EF94 / 6AU6A Sharp-Cutoff RF Pentode Recommended for: McIntosh Tuners & Microphones - Schoeps CM61 mic -Sony C37A and Altec 21 - C800G Sony mic - C37A Sony mic - McIntosh Model MR FM Tuners: MA 6 Multiplex adapter for MR66 x 1 tube MR 55 Tube. AM-FM Mono. x 3 tubes MR 55A Tube. AM-FM Mono. x 4 tubes. MR 65 Tube. Mono. x 4 tubes MR 65B Tube. FM tuner Stereo. x 4 tubes MR 66 Tube. Mono/stereo. x 4 tubes MR 67 Tube FM tuner. Stereo. x 3 tubes MR 71 Tube. FM Stereo. x 4 tubes Change your TUNER or MICROPHONE into something better withTUBE MUSEUM CERTIFIEDLOW-NOISE AMPLITREX TESTED 6AU6 = EF94"GOLD-GRID" VERSIONfor SUPERIOR PERFORMANCETested on Amplitrex AT1000 Digital Tube Test System Tested on the Amplitrex AT-1000 with phenomenal results All tubes test 3,800 to 4,400 mA/V = 100% Select 2 for a matched pair (2 tubes)Select 4 for a matched quad (4 tubes) THIS TUBE HAS ZERO (0) uA leaks and zero (0) mA gasmicrophonic free Amplitrex Tested Tube Actual tube was tested on the State-of-the-Art AMPLITREX AT-1000 Electron Tube Test System CERTIFIED ULTRA-LOW-NOISE MUSEUM SPECIMENSTubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be. Terms of Auction6AU6 "GOLD-GRID" VERSIONfor SUPERIOR PERFORMANCEAttention: Warranty Void and No Returns if STICKER on tube is removed. Bid ONE (1) for A SINGLE TUBE! Bid TWO (2) for the matched balanced pair!Bid FOUR (4) for the matched balanced QUAD!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.NO ZERO (0) FEEDBACK BUYERS - YOU NEED PRIOR PERMISSION TO BID OR BUY 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 Please SEE my other ebay Auctions : Visit this seller's eBay Store! TUBEMUSEUM NEW YORK