MHDT Orchid TUBE ROLLING

Curiosity Question
                             I have a DAC and Phonostage using E88CC's.
How does the 6SN7 find a usage in a Circuit that can use the E88CC, 6922, 6n23p Valves.
I would be keen to learn about this as an alternate option for my own trials.   

pindac,
https://tubedepot.com/products/6sn7-to-6922-adapter

garage1217 makes far superior adapters than those chinese units 

I have some Russian 6922 equivalent tubes leftover from a tube output CD player I had years ago. I'll need to try to identify them before I try any, but I seem to remember them being 6N1P or 6H30. Anyone try one of those? I think think they are only loosely compatible (heater current?) and I'd rather not let the magic smoke out of any components.

Orchid ordered. Going to try the stock tube first (weird, right?) Probably get the 6922 adapter if I can positively identify the tubes I have floating around. Are there any 5670 or 6922 new production tubes worth a look? I have notoriously bad luck with NOS tubes.

Thank You for the Link.
This will be a good upcoming experience to be undertaken.