I never saw any answers to this question? I have some very nice 6c8G's so "will they work" in the Baltic without seeing a fireworks show? My experience has always been that you can use a 6sl7 in a 6sn7 circuit without too much drama?!?That’s awesome thank you so much! I checked out the Woo audio page and saw the 6F8G/6C8G —> 6SN7 adapter. I haven’t read anything about the 6C8G tube. Have you tried any of those?