Pure tube phono preamp

yes, no sut in the signal path, just pure tube gain and quietness.

Does anyone know if current mode phono preamps use SUTs? 

I believe most phono preamps have them automatically built in.  

An all tube, no transformer, unprohibitively priced, phonostage seems to be a unicorn.   Nothing against SUTs, it just seems like a shortcut and another thing in the signal path that could affect the sound.  Doing my homework on this subject, I'm starting to see how most tube designs use transformers for LOMCs.