Telefunken E88CC Röhre Electron Tube Original Made in Germany ULM Diamond bottom

Die Telefunken E88CC gilt als eine der besten HiFi-Elektronenröhren der Welt. Das Original aus Ulm ist qualitativ unschlagbar. Ich kenne keine Röhre die so sauber klingt wie das deutsche Original aus den 60er-Jahren.  Alle meine TELEFUNKEN Röhren sind original TELEFUNKEN! Die E88CC ist Long Life Version der ECC88 und hat daher höherwertigere Materialien verbaut. Die Pins der E88CC sind vergoldet.
 
Wie erkennt man einen Fake? 
Das Original hat im Glasboden eine Raute (Diamond Bottom), vergoldete Pins, Kreideschrift, einen Ulm-Code, und das charakteristische Aussehen.
 
All of my Telefunken E88CC tubes are:
 
Made by TELEFUNKEN in Western Germany
Produced in the 60ies or 70ies
Have the diamond bottom
Have gold plated Pins
Are made in the city of Ulm (U-Code on the rear side)
USED tubes are pulled from working medical or industrial equipment
NOS tubes are from surplus tube stocks and never used before
My tubes have never ever seen any HiFi Audio gear.
They are fully tested with ROETEST and then selected and matched by hand
Are 100% pin compatible with ECC88, 6DJ8, 6922
 
At Koschuh you can select from many different options, depending on your wealth and needs:
 
USED = Your tube is like new. Serioulsy, there is no difference between a NOS tube with 100% and a used tube with 100%, other than the used tube has already proven it's quality. It was pulled-out from surplus vintage equipment, like scientific measuring devices, broadcast equipment, medical equipment, electronic calculators, industrial circuits, or commercial radio transmission equipment. Your tube has never seen an Audio or hifi equipment before. It has never experienced tube rolling (something that I cannot accept to be done with my tubes). I have pulled them out all by myself and that's the guarantee for an authentic source. They are carefully cleaned without wiping of the chalk-writing. Your tube was tested by myself on a ROETEST tube tester. It has 100% or more anode current, and comes with a test protocol print-out.  There is nothing wrong with buying used tubes, as long as they show 100% or more emission current. Do not buy untested tubes, or tubes without test protocol. 
 
USED (Balanced) = Same as with "Used". This tube was also pulled out of surplus electronic equipment from the 60ies of 70ies. But after testing it was found to have very balanced systems. See, the E88C consists of two triodes. Sometimes, in really rare cases, these two triodes have nearly the same anode current emission (in % and mA). This is important for symmetrical audio circuits. If one half of the sine wave is amplified by one triode, and the other half of the sine wave is amplified by the other triode (of the same valve), you need the same amplification. Else you will have non-linear distortion. Balanced systems do not matter for standard audio circuits. Do not buy Balanced tubes if it's not necessary, but order them if you are not sure.
 
NOS = This tube is new old stock AND comes with a box AND was tested to have more than 100% emission (Note: not all tubes out of a sealed Box have 100% - hence I test each tube). This tube has never been used before. 
 
NOS (BALANCED) = This tube is new old stock AND comes with a box AND was tested to have more than 100% emission (Note: not all tubes out of a sealed Box have 100% - hence I test each tube) AND has balanced triodes. This tube has never been used before. 
 
USED (Matched pair): You will receive 2 used E88CC that have nearly the same technical data. They can be from same production date, but can also be from different batches. All that counts is the measuring data. 
 
NOS (Matched pair): You will receive 2 new E88CC that have nearly the same technical data. They can be from same production date, but can also be from different batches. All that counts is the measuring data. 
 
USED (less than 100%) = The cheap solution, that fits almost any application. In most cases you don't need full anode current and a tube with 90% will do aswell. The clarity and sound of your tube amplifier doesn't just depend on the anode current capabilities only. You don't need strong tubes, if they only run at 10% of their maximum current capabilities (like in many phono equalizer amps or pre-pre-stages). I would always buy USED tubes with less than 100% emission, as it's the cheapest and best method to enjoy the real Telefunken sound. You will get a used tube, or a NOS tube with less than 100%. All tubes sold under this marking have atleast 85%. There is no choice possible. If you order two or more tubes, I will try to combine / match them together, but this is absolutely not guaranteed.
 
 
Photos are symbolic / Ulm-Codes can be different