There's some discussion elsewhere (diyA) that the 6p3s-e can't be pushed to be a 6l6gc but rather should be treated as a straight "g" only.

Found a set of tiny plate curves digging in the wayback if you want to overlay and do all that. Didn't look that deep.

https://web.archive.org/web/20120419015624/http://www.tubes.ru/techinfo/HiFiAudio/6p3s.html

Here's a straight browser translation of the pinout if it helps any on the datasheet.



I say turn out the lights and see where they glow and back it off a bit Nah--just fooling--no experience with them at all.