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Welcome to ... TUBE MUSEUM NEW YORK PRICE IS FOR THE BALANCED MATCHED PAIR! Bid one (1) for a matched pair! Always the highest quality. Fast shipment. Safe, protective packaging. A pleasure to do business with. Competent. Trustworthy. Been buying tubes for several years now. Buyer: frankdefreitas ( 1130 ) US $249.95 New message from: badbusa_2000 (84 ) Dear Tube Museum, I had these tubes in for a bit now, all I can say is wow! Next level sound indeed, I won’t go into all the details but boy am I glad I purchased them. Phenomenal product and glorious sound. Would buy from again. Thank you. NOS RCA (# 233781615969 ) Buyer: badbusa_2000 ( 84 ) US $224.99 Past month NEW IS NEW IS NEW! NEVER-USED REAL NEW OLD STOCK in ORIGINAL NUMBERED BOXES! IMPOSSIBLE TO FIND EXCEPT AT THE MUSEUM! TUBE MUSEUM NEW YORK TUBE MUSEUM QUALITY TROPHY-QUALITY TUBES! "CREAM of the CROP" BEAUTIFUL FULL DELICATE LETTERING SUPERB NEW OLD STOCK 1960's RCA Made in USA LOW NOISE 12BH7A This is a multiple-listing and print will differ from picture, All have the RCA "STOP-SIGN" acid-code and the same production series STAPLED-PLATES for detailed sound! Made in USA in the 1960's WITH STOP-SIGN CODE & DUAL ELECTROSTATIC SHIELDS CERTIFIED ULTRA-LOW-NOISE SPECIMENS TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be. What I like about these tubes is that they have Matched & Balanced Triodes with Uniquely closely Matched Plate-Resistance (Rp) & matched Tube-Gain (Mu) STAPLES PLATES PROVIDE EXTRA SUPPORT TO ENSURE LOW MICRO-PHONICS AND STABILITY AND LONGEVITY PRECISION TESTED & LIVE AUDITIONED ON 1960 McIntosh MC-225 AMPLITREX AT1000 TESTED: Mirror-matched triodes are hard to find! 3,000+ mA/V (100%+GM) W0W! 3,000+ mA/V (100%+GM) WOW! Mirror-matched triodes are hard to find! 3,000+ mA/V (100%+GM) W0W! 3,000+ mA/V (100%+GM) WOW! BALANCED & MATCHED PAIR WITH IDENTICAL CONSTRUCTION! CLOSE AND TIGHT BETWEEN THE TUBES AND THEIR TRIODES! EVERY TUBE'S NOS % GIVEN WITH ACTUAL TUBE MUSEUM PROOF! MOST RCA 12BH7's BEING SOLD ELSEWHERE HAVE A VERY LOW mA/V / Gm! Don't take foolish chances with Other offers with weak 50% TO 70% EMIS (mA/V) Gm, if lucky! There is a GANG of tube seller's on eBay with used product that advertise as "STRONG" with meaningless numbers and when you test their tubes they are weak! Only BUY THE BEST Tube Museum Tubes ... NEW IS NEW IS NEW! NEVER-USED REAL NEW OLD STOCK! These tubes all have VERY HIGH mA/V which is really important to insure a LONG-LIFE of your 12BH7 tubes! Did you know that weak 12BH7 preamp tubes put an unnecessary strain and SHORTEN the LIFE of you other tubes in the circuit? If you want the "CREAM OF THE CROP" the BEST there can be, this is it. TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be. TESTED AT REAL-WORLD POWER LEVELS ON AMPLITREX AT-1000 in Fixed-Bias Mode Tested on Amplitrex AT1000 Digital Tube Test System ..." * Rp or plate resistance is the second most important parameter as it directly affects the output impedance of the preamp. Circuit designers are looking at Mu primarily, Rp next and we hardly care about Gm at all. Why then do most vendors measure Gm and Gm alone? Because most testers only measure Gm! No commercial tester ever measured Mu either ( until the AMPLITREX AT1000 was introduced.) And even the Hickock, treasured for measuring Gm, doesn’t measure it meaningfully (due to current dependency), accurately (due to calibration difficulties) or consistently (due to internal circuit drift).'"... This tube is known for excellent performance, smooth highs, outstanding 3-D holographic soundstage, lots of open-air, inner detail, and overall perfect resolution and balanced sound. Terms of Sale PRICE IS FOR A PAIR! Bid one (1) for a matched pair! 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. 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 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 DEPENDING ON YOUR COUNTRY'S MAXIMUM INSURANCE RULES "PRIORITY or EXPRESS SHIPPING" may be required for certain countries , U.K.,Italy, Russia, Indonesia, Australia, Pacific Rim, and others.(Please kindly ASK before you bid or we reserve the right to cancel your bid) 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. 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