Hallo Holger,
nachdem mein Röhrenprogramm mit der "kleinen Chinesin" nichts anfangen konnte, bin ich schließlich bei Wikipedia fündig geworden.
Although not originally designed for the purpose, it became popular in hi-fi audio amplifiers. European-produced version of the tube is designated ECC88. An industrial (improved/higher ratings) version of the tube is designated
6922. New Old Stock (NOS)
6DJ8s and
ECC88s produced in the past by major American or West European vacuum tube manufacturers (such as Philips or Amperex) remain extremely popular with and highly sought by audiophiles. A version (direct equivalent) of this tube was also produced in the Soviet Union under the designator
6N23P (Russian: 6Н23П) and in China, under the
6N11 designator.
The tube is currently being produced in four versions in Eastern Europe - Slovakia by JJ Electronics (ex-Tesla), Serbia (Ei) and in Russia - 6DJ8 for Sovtek and 6922 for Electro-Harmonix.
http://209.85.129.132/search?q=cache:AG ... cd=3&gl=de
Also dürfte durchaus passen

Gruß Martin