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i collection(and my ears) cr Welcome to ... TUBE MUSEUM NEW YORK TUBE MUSEUM QUALITY NOT SOMETHING YOU FIND EVERY DAY! EXTREMELY RARE! 1950's EL34's... Collector's items GROW in value! Take for instance a 1950 Fender Blonde Telecaster: $ 110,000.00 ; Body Material, 2-piece Ash ; Finish Material, Lacquer ; Neck/Fingerboard, Maple ; Radius, 7.25". Price. The Fender Telecaster and Esquire sold for around US$179 and $139 respectively in 1951. 1950 EL34's... We can say the same about a Porsche 356 Cabriolet, an exceptional car... The Hagerty price guide pegs the value for such a car in average condition at $244,000, going up to $693,000. When new in 1951, the Porsche 356 cabriolet cost U.S. $4,250 , 1950 ROLEX GOLD WATCH ... Rolex Rare Vintage Semi Bubble Back Oyster Perpetual Coin Edge Bezel Watch $36,247 Well then .... Here's a 1950 MATCHED PAIR of EL34 Double D-D Getters and Brown Bases! Does a Brussels EL84 Double D-D Getter Brown Base hold its value? These audio tubes are effortlessly timeless and an undisputed classic, meaning that there will always be a market for them. Additionally, like all Original (not re-issues) EL34's, the Double DD Getter Brown Base tube has an amazing ability to retain value over the years , despite wear and use, due to the rare earth metals in the tube which are no longer available, anywhere! The sound and the way they transform your amp's musical reproduction into a "real live performance" is astonishing. The XF4 DOUBLE-D-D BRORN BASE version, like many early tubes, has welded plates, along with that thick, dark getter that is a trademark of the valves that rolled out from the BRUSSELS factory. ..."The Mullard BRUSSELS M.B.L.E.factory EL34, compared to the other Mullard production tubes I've heard, has a real magic. The music flows with more ease - a naturalness that is hard to describe, but the sound that is reproduced is cut from the same cloth in a grain-free way that makes me forget that I'm listening to a stereo or musical instrument amplifier."... ..."The Brussels Belgium factory "sound", for whatever reason, has always been on the darker scale than neutrality. Perhaps there is some secret mojo in the cathode chemistry or the metal quality, but this sound difference is easily noticeable in comparison to an original Philips EL34 or even any modern EL34."... After 70 years the DELICATE SILKSCREEN which can be understandably flaking and missing and comes off with the slightest handling, which tells you that they are authentic, is NEAR PERFECT! Mullard never would have dreamed that 70 years from creation their tubes would still be JUST AS NEW with strong time-capsule mA emissions. RARE NOS (NEVER-USED) 1950 MULLARD EL34 6CA7 Note the "BWB" FALCON logo on the tubes, an acronym for Bundesamt für Wehrtechnik und Beschaffung (German: Federal Office of Defense Technology and Procurement) ALL ARE ACTUAL PICTURES OF THE RARE NOS TUBES AND TEST RESULTS YOU WILL RECEIVE "THE RAREST BWB EL34 OF THEM ALL" "HOLY-GRAIL" MATCHED "BWB FALCON" PAIR DOUBLE-D-GETTERS WELDED-PLATES! ALL ARE ACTUAL PICTURES OF THE TUBES AND TEST RESULTS YOU WILL RECEIVE xf4 Double D-Getter Rings RARE MATCHING CODES! Code 1 xf4 L0E and Code 2 xf4 L0E Rare & Desirable BROWN BASES Meticulously WELDED-PLATES EL34 MULLARD-B.V.A. M.B.L.E., Mullard's Bruxelles DOUBLE "D" GETTER 1950 ESOTERIC TUBES! THE OLD 1950's TUBES ARE COVERED IN MIRROR-LIKE SILVERING, A SIGN OF STRONG HEALTHY TUBES! Tube Museum Quality 1950-60 MADE IN BRUXELLES "MULLARD LOGO" PROFESSIONAL DOUBLE-D-GETTERS EL34 BROWN BASE 1950 known to be …"sonically close to the METAL BASE 1950's and XF Mullard 1958-1962, these are the 3 best sounding EL34 every made"… All Actual Pictures of Select Premium Audio Tube PAIR /Valves with codes both clearly visible! YOUR 2 TUBE CODES: XF4 LOE and XF4 LOE THE MYTH OF Xf: The internet is flooded with myth's about Mullard Xf* codes! I seems whoever has the most stock of one type claims it's the best. Reasons have been that xF4's have crimped or stapled plates, not making them "as strong"! Well, here we have a MATCHED PAIR with Double D-getter-rings, Brown Bases, and WELDED PLATES! , you can see the spot-welds in the photos. The different versions are mostly made up of "single-halo", "double-halo, or "double D-getter ring: EL34's.Just because some"one" happened to have a bad experience with a certain tube they associate their bad experience will ALL of that tubes revision type! I think you must agree that anyone can post on the internet and you can not believe everything you read. Besides, these are NOT made by Mullard which these false-claims you read about are referring to. These are made by MULLARD'S M.B.L.E. EL34 PRODUCTION FACTORY from Brussels, Belgium in the 1950's. With vintage NOS testing tubes , we need to pay attention to the CODES in the glass. These tubes have an L in the acid code identifier. We suggest downloading a copy of the PHILIPS TUBE CODES to fully understand factory origins. L is the CODE for M.B.L.E., Bruxelles, Mullard. Tubes were labelled for OTHER factories back in the golden days for tube making. The tube is NOT a Mullard made tube. This is quite common back then for this practice of re-labelling. For instance you may have seen Siemens & Halske labelling for Telefunken. Or, Sylvania tubes with RCA labels, etc. Also, BROWN bases are a dead giveaway for 1950's production as well as DOUBLE-D-SQUARED-GETTER RINGS. These getter types ended in the late 1950's with a few exceptions into the very early 1960's. Actual tubes were tested on the State-of-the-Art Tube Museum Certified Tube Test System 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. ..."The World's most musical EL34 tube known for its pronounced liquid midrange. Amplitrex Digital tested and plate matched for your musical pleasure Selected for Uniquely Matched Plate-Resistance (Rp) & Tube-Gain (Mu)! ..." This tube is known for excellent performance, incredible bottom end, pronounced liquid midrange, outstanding highs. Described as the most musical sounding EL34 in the world, one of the most rugged longest lasting EL34's ever made, recently imitated but never equaled, clean, and powerful."... These legends have a super polished and quite refined bass, midrange, top end. A Major improvement over other 6CA7's. Get rid of those Chinese or Russian 6CA7's and UPGRADE to original Philips DD-getter power tubes - which are Superior by far to Svetlana or Sovtek re-issue EL34's"... PRICE IS FOR 2 BALANCED & MATCHED TUBES: Matched PAIR with Double DD Getters TUBE MUSEUM QUALITY STRONG LEGENDARY POWER TUBES LOW-NOISE - BEAUTIFUL SOUNDING - 1950 RARE MADE BELGIUM AUDIO TUBES MATCHED PAIR (2) of the Rare DD-DOUBLE GETTER RING Production, with D-D-Getters AND BROWN BASES! Very Compelling Musical Tone with Long 10,000 Hour Heater Life! These twin top-mica shields are designed to "deflect" unwanted electron bombardment to prevent cathode-poisioning. They work as a deflector-shield and help the tube achieve its correct operation point and last longer and operate cooler. Recommended for: Conrad Johnson Dynaco ST-70 Vox Park HiWatt Matchless Marshall JTM combo 50 watts 1978 Marshall "Plexi" Fender Amps Musicman These tubes are "PROFESSIONAL SPECIAL QUALITY" Premium Quality Amplitrex Digitally Tested Audio tubes Would you feed yourself without knowing the ingredients? Of course not, so don't feed your precious audio equipment a tube not knowing the complete specifications! Here we have an excellent example of the finest EL34 low-noise tubes. tube 1: 105.4mA (105%) with 12,400 tube 2: 105.1mA (105%) with 12,200 265 eP (plate voltage) and 250 iP (plate current) In the auto-bias mode they both match perfect at 105%/105% with power tubes this is what we look for, the mA: The Gm is just as great: 105.4 mA ( 105.4% Plate) with 12.4mA/V (12,400 Gm) rises to 12,600 with multiple testing 105.1 mA ( 105.1% Plate) with 12.2mA/V (12,200 Gm) rises to 12,500 with multiple testing It doesn't get better than this. Precision tested on Amplitrex AT-1000 All Tubes Tested on Amplitrex AT1000 DIGITAL ELECTRON TUBE TEST SYSTEM @ 250V REAL WORLD POWER! Beautiful Balanced & Matched Pair @ fixed bias mode @ 250 VOLTS! CERTIFIED ULTRA-LOW NOISE TOP-GRADE Double D D Getter Rings! AMPLITREX AT1000 PRECISION TESTED 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 Sale PRICE IS FOR THE RARE 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. THE COST OF ALL USA SHIPPING INCLUDES INSURANCE, TRACKING NUMBER AND DELIVERY CONFIRMATION 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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