6SN7 equivalent's, help need it

I never heard of the 6CC1 tube in general nor as a replacement/substitute/equivalent for a 6SN7. THe replacements I know can be viewed at the web site below. You probably should consult a reputable tube retailer.

http://www.tubeseller.com/ratings.php

I am not going to put them in my amp before I am 100% sure of it. These tubes are the rarest I came across, same as Telefunkens 6SN7 for example.
So far, got the info from 2 places where folks are think/tell it can be used, but to me, only data sheet can tell.

Another interesting note. Spoke to some pro and he think he owns a pair of the same kind, but only RFT branded, but he is not sure yet, will keep in touch with him to see if anything comes up.

What do you think guys, if I am going to test them like 6SN7 type, can this cause the problems, for tube or for an tester?

THX

There is a great program for tube substitutions called Duncan's Amp Tools. It's a free download. Do a search. You should be able to find it without too much trouble. The program shows you all the variants to each tube type. Very helpful.

@Jaiello

Thanks, indeed, very helpful. Unfortunately, they do not have anything about this kind, at least when I use their tube data.

THX