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NOS Siemens Halske CCa = E88CC / 6922 Grey-Shield HOLY GRAILS MATCHED QUAD 1959
NOS Siemens Halske CCa = E88CC / 6922 Grey-Shield HOLY GRAILS MATCHED QUAD 1959
1959 Platinum Low-Noise CCa Siemens GRAY Shield "early painted codes"


 
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Product Code: SH_CCA_59-QUAD
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PRICE IS  FOR 1 BALANCED & MATCHED QUAD!

The following ubiquitous quote from the TubeMuseum.org Famous Review of the Best Top 6922 Audio tubes ever:
#1 Rated =  E88CC or CCa Siemens & Halske 1950's to 1960s D getter or 1958 to 1960's O getter halo "Rarest and most sought after CCa, has "gray or silver shield" between plates and "Frame-Grid" construction. Most realistic sounding holographic soundstage, pure seductive sonic joy, Complex symphonic images emerge effortlessly".

1959 was the year KIND OF BLUE by MILES DAVIS was released. 59' Vintage with Siemens Halske painted on glass front-codes. These series pre-date the acid-codes.

One of the Rarest and most sought after CCa

1959 Vintage with Siemens Halske painted on glass front-codes.These series pre-date the acid-codes.

NOS comes with Authentic Siemens replacement boxes, the same identical tubes with gray-plates in the pictures.

PRE-ACID CODES: 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.
PRICE IS  FOR 1 BALANCED & MATCHED QUAD

Pictures of Actual Tubes - authentic replacement boxes displayed included for FREE!

From the Tubemuseum Vaults - A REAL Archeological find ... 1959 Siemens Halske with VERY RARE "O" Getter with Silver Electro-Static Shield-Plates. One of the "Rarest and most sought after CCa, has PRE-ACID CODE "PAINTED CODES". 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 CCa - even better sounding than Telefunken!  These tubes are known for excellent clarity performance, smooth high end extension, inner detail and overall resolution and balanced sound.  Revered by many as one of the MOST DESIRABLE CCa - the HOLY-GRAIL of the E88CC family and one of the the MOST DESIRABLE CCa.  CERTIFIED ULTRA-LOW-NOISE PHONO-GRADE SPECIMENS - Manufactured in Munich Germany decades ago!
Low Noise CCa - THE BEST!

NOS Platinum Low-Noise CCa Siemens Gray Shield with oldest "painted front codes"

Display the matching "painted on glass"  early version codes: 031003 and 031003 = 1958 to 1959

Price is for a Balanced Matched Platinum low-noise QUAD.  

16.5mA/16.0mA to 15.8mA/15.6mA  WOW!

Excellent "dream tube" for your Rode mics or preamp, CD player

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.

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