NOS Siemens CCa (E88CC 6922) Grey-Shield HOLY GRAIL 1959 SINGLE TUBE 148%/148%

$504.0 Buy It Now or Best Offer
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Seller Store tubemuseumusa
(6083) 100.0%,

Location: Bradenton, Florida
Ships to: US,
Item: 296335189839

Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
Siemens:Siemens
Type:CCa / 6922
NOS:NOS AMPLITREX TESTED
TUBE NUMBER:CCa
CCa:CCa
MPN:CCa
Country/Region of Manufacture:Germany

TubeMuseum RATED THE “BEST SOUNDING” CCa EVER MADE FACT!: 144% mA LONGEST-LIFE TESTING NOS SIEMENS CCa are EXTINCT and truly ONE-OF-A-KIND! THE “TRUE HOLY-GRAIL” OF ALL SIEMENS CCa!EXTREMELY RARE, IN FACT IMPOSSIBLE TO SOURCE, EXCEPT FROM THE TUBE MUSEUM NEW YORK! …”About 1 in 100 tubes test this Perfect”… NOS SIEMENS CCA (E88CC 6922) GRAY-SHIELD EARLY 1959 HOLY-GRAIL PLATINUM LOW-NOISE SINGLE TUBE – RATED “BEST SOUNDING” # 1 CCa EVER MADE 1959 Vintage with Siemens Halske painted on glass front-codes.These series pre-date the acid-codes. NOS comes with it’s Authentic Siemens Original Numbered box, the ACTUAL identical tube with gray-plates in the pictures. ACTUAL PICTURES OF 1959 low-noise PRE-1960 ACID CODE: ACTUAL PICTURE OF SINGLE TUBE YOU WILL RECEIVE, TESTING: tube 1: 22.4mA and 14,400 mA/V 148% 22.0mA and 14,360 mA/V 148% NOS TUBES TEST AVG. 12,0mA and 11,000 mA/V for this early year. THE ACID-CODES ARE NOT IN THE GLASS in THESE EARLY VERSIONS ( and of course NOT stamped on tags) THESE PRE-DATE ACID-CODES and the codes were “painted” on the front of the glass. From the Tubemuseum Vaults – A REAL Archeological find … 1959 Siemens Halske with VERY RARE “O” Getters with Gray Electro-Static Shield-Plates CCa. “Rarest and most sought after CCa, has “gray shield” between plates, Most realistic sounding holographic soundstage, pure seductive sonic joy, complex symphonic images emerge effortlessly” – quote from the tubemuseum review. Audiophiles vote these as the best-sounding Frame-Grid Construction 6922 – even better sounding than Telefunken! These tubes are known for excellent performance, smooth highs, inner detail and overall resolution and balanced sound. Revered by many as one of the MOST DESIRABLE CCa / 6922 – the HOLY-GRAIL of the E88CC family and the MOST DESIRABLE 6922. CERTIFIED ULTRA-LOW-NOISE PHONO-GRADE SPECIMENS – Manufactured in Munich Germany almost half a century ago! Low Noise early 1960 Siemens & Halske CCa = 6922 – THE BEST! Display the matching “painted on glass” early version codes: 031003 and 031003 = 1959 Price is for a Balanced Matched Platinum low-noise pair. No Gas, and zero (0) uA heater-to Cathode (H-to-K) zero leaks Fixed Bias Readings tested @ 100 eP % of the Balanced Matched, Platinum Low Noise “Best Quality” Siemens CCa = E88CC/6922 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. Improved dynamics, frequency extension accross the spectrum are immediately obvious, making the music sound much more accurate and real. A major improvement over other E88CC / 6922’s Make sure you are buying Real Siemens Halske CCa = E88CC / 6922 tubes – They have the double-stage getter frame-grid construction, Gray separator or Gray Electro-static shield, 4 seams on top and numbers in the glass between the pins and the Siemens & Halske S+H logo on the front of the tube. “…If you haven’t yet experienced 15mA (100% mA+) per triode CCa = 6922’S you don’t know what you have been missing. Instruments seem to come out of the wood-work, you hear harmonies, musical energy & subtle Nuances which you haven’t heard before, and without these you may never hear them …” CCa = LOW-NOISE E88CC “6922” = PREMIUM QUALITY GOLD PIN E88CC: The “CCa” is an E88CC specially selected for “Post Germany” in the 1950’s -60’s, they were a special low noise, low microphonic, long-life E88CC / 6922. Philips had similar “designations” for the “Dutch Post”, some tubes that were selected had “PTT” * and “BP” lettering or etched designations, but they were the same as a top specification E88CC. The “German and Dutch Post” consisted of telephone, telegraph, telex, and the postal system “tube” technologies which required LOW-NOISE E88CC / 6922. A CCa is the same as a 6922 but was tested and certified with high mA, RP, and Mu and lowest-noise audio threshold – the same proceedure the Tube Museum New York certifies tubes by today. Much of the telephone centrals used vacuum tube technology equipment for telephone equipment requiring a “noise-free” enviroment. The letters “CC” probabably equates to “double triode”, and for a special low-noise design – the “frame-grid” inner construction, which was actually invented by Amperex USA, and became ubiquitous – Present, appearing, or found everywhere in the 6922/E88CC design of the day, including Siemens Halske, Telefunken, Amperex, Philips, and many others. Internally the inner construction of the CCa is identical to Siemens Halske E88CC – why? Because the only difference is the cosmetic-lettering and ofcourse the “special selection” of the best and quietist specimens. In addition, the suppliers of the day, wanted a sure method of identifing the tubes they provided, as the very tubes sold to these companies. It could have been very easy to swap with a current different E88CC in the day, if it wasn’t uniquily labeled, simply by walking down to the local radio shop and purchasing a different tube. The CCa factory markings identified the original supplied tubes as the ones guaranteed by the Siemens “Klingarm” Division ( “Klingarm” is the term for low microphonics. You often see Telefunken EF12K or AC701K, the K means Klingarm) whom charged a premium for selected low-noise high mA specimens for industrial customers. * Pneumatic tubes controlled by vacuum tube amplifiers (or capsule pipelines or Lamson tubes; also known as Pneumatic Tube Transport or” PTT” in the 1950’s-60’s PPT systems were vacuum tube controlled) In the 1960s, Lockheed and MIT with the United States Department of Commerce conducted feasibility studies on a vactrain tube powered by ambient atmospheric pressure and “gravitational pendulum assist” to connect cities on the East Coast of the US. The following ubiquitous quote from the TubeMuseum.org Famous Review of the Best Top 6922 Audio tubes ever. 1) E88CC or CCa Siemens & Halske 1950’s to 1960’s D getter or 1960’s O getter halo “Rarest and most sought after CCa, has “Gray NOT silver shield” between plates and “Frame-Grid” construction. Most realistic sounding holographic soundstage, pure seductive sonic joy, Complex symphonic images emerge effortlessly” 2) E88CC or CCa VALVO Heerlen Holland 1960’s “Real sonic holography, best-musicallity sounding, compellingly realistic, extremely incredible detail, warmth, and clarity – all at the same time, rated up there with the Siemens CCa, classified audiophile-extreme rarity, almost never seen or available in real NOS, especially in the most desirable D getter ring 3) E88CC or CCa Telefunken West Germany 1960’s “Excellent neutral holographic soundstage, vast vocabulary of tone Establishes remarkable layers of harmonics, very rare” 4) E88CC or CCa Siemens & Halske A-FRAME construction late 1960’s to early 1970’s “Beautiful open air holographic images, low microphonic tube construction, rare. Sonically Brilliant, Pristine, Musical & Therapeutic” 5) E88CC or CCa LORENZ West Germany early 1960’s “Beautiful open air holographic images, very rare” 6) E88CC or CCa Siemens SINGLE STEM 1980’s “…Unfortunately, most of these 1980’s tubes often loose vacuum prematurely, and the heads turn white, as they quickly loose their vacuum – not recommended! Stay-Away!” “Audio tubes in general need to settle-in to the new environment, and get better with ‘burn-in’. With the Siemens Halske E88CC you are going to hear ALL the frequencies passing through your system, the more sensitive the tube the more you will hear. You are using AUDIO GRADE tubes with the Siemens E88CC, which have a sonic-signature that reproduces not only the ‘odd’ harmonics (1-3-5 etc.) but also the ‘even’ harmonics (2-4-6 etc.) The new tubes made today in China and Russia only reproduce ‘odd’ harmonics – that’s why everyone upgrades to a vintage made tube made decades ago when these rare ‘earth-metals’ were available in the inner construction of the vintage tube – now these metals are too expensive to use and today’s tube-makers have found cheaper substitutes which seem to work but do not reproduce all the nuances and textures in music. …” The Tube Museum New York …”You are using AUDIO GRADE tubes with the Siemens E88CC, which have a sonic-signature that reproduces not only the ‘odd’ harmonics (1-3-5 etc.) but also the ‘even’ harmonics (2-4-6 etc.) The new tubes made today in China and Russia only reproduce ‘odd’ harmonics – that’s why everyone upgrades to a vintage made tube made decades ago when these rare ‘earth-metals’ were available in the inner construction of the vintage tube – now these metals are too expensive to use and today’s tube-makers have found cheaper substitutes which seem to work but do not reproduce all the nuances and textures in music.”… The Tube Museum New York…”The harmonics of an amplifier can be revealed in the distortion measurements. There are two types of harmonics; Even order harmonics and Odd order harmonics. Musical instruments naturally create lots of Even order harmonics. So do single-ended amplifiers BTW. However, I can’t think of too many things in nature that create sound with Odd Order Harmonics, except for solid state and tube push pull amplifiers! This is why you don’t get an organic sound from these types of amplifiers, and why everyone is so gaga over Single ended designs. This works by simply playing a single tone at 1kHz and measuring the echo! You can see that the first harmonic (A) is at 3kHz – an ODD number. The next (B) is at 5kHz and the third (C) is at 7kHz. This is what an ODD Order Harmonic signature looks like. Notice there is no even order content whatsoever. Also of interest is the average noise floor seen between the test signal at 1KHz and 20kHz is about -110dB. (larger numbers are better). Considered very good this noise level is brought to you by a Balanced XLR solid state push pull power amplifier.”… The new tubes made today in China and Russia only reproduce ‘odd’ harmonics – that’s why everyone upgrades to a vintage made tube made decades ago when these rare ‘earth-metals’ were available in the inner construction of the vintage tube THE “TOTAL SOLUTION” Siemens Halske E88CC 6922 for proper “odd” and “even” harmonics reproduction FOR PROFESSIONAL USE ONLY Low-Noise Tested Microphonic Free No H-to-K Leakage (Heater-to-Cathode) No leaks (0) zero! TESTED IN THE “FIXED-BIAS” MODE most similar to Hickok settings Actual tubes were tested on the State-of-the-Art AMPLITREX AT-1000 Electron Tube Test System CERTIFIED ULTRA-LOW-NOISE NON-MICROPHONIC SPECIMEN 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 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. 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 CONFIRMATIONNOTICE: 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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