Used my Chorus with Tandberg 3006 power (late version) with great results. The preamp you use will determine the character of the sound of the system on the whole
The tester (Л3-3) does not have a socket for 6C33C also no current/power enough to work with this tube although some people in web say enough to test it "half by half" - You can find it in the middle of the page (pictures) https://forum.cxem.net/index.php?/topic/112494-карты-для-измерителя-параметров-ламп-л3-3-л1-3/page/6/-
Can help if Googletranslate is not good enough
Sorry, no good news... Both most common ussr testers Л3-1 and Л3-3 do not have ability to work with 6С33С.
Have asked 2 friends (both make amps based on this tube) - both of them match 6С33С-s when they are already on their place in the working amplifier
Yes, it is... Ok, I can investigate the name of the brand and the model but you should keep in mind as usual they are big and heavy i.e. delivery Ukraine -> States gonna be not very cheap I'm afraid... still interesred?
Works good. Best result with one of Valvo ECC82 from late 50's
Also have to say one more thing (though it's off topic here, sorry): here in Ukraine we are very grateful to the people of the United States for the help. Thank you so much! We will never forget that
These two sound great! Unfortunately the balanced input is not true - just switching between two connection options.
Here you are http://www.audiolot.com.ua/
Unfortunately I cannot find English version... After having pushed as shown at the pictures you'll get to the old amps they produced