Pure tube phono preamp

Another Vote for SUT, especially one with MM bypass, and options.

I took Bill’s (and other’s here) SUT advice,

kept my wonderful MM phono stage in my McIntosh mx110z tube preamp, and found a quality SUT to boost my first MC cartridge signal up to MM signal strength.

There are a lot of SUT choices out there, I got help here understanding what’s involved, researched, always fun to learn. here's my SUT search discussion here

https://forum.audiogon.com/discussions/which-sut-for-3mv-10-ohms-mc-cartridge-into-3mv-mm-input-sens...

I chose Fidelity Research FRT-4, I moved it here/there, I could not hear any hum, it’s well built.
Not finding one for sale now: this sold one shows features/flexibility. 3 tonearm inputs front selectable; MM bypass; 4 optional impedance settings via front switch

https://www.usaudiomart.com/details/649456327-fidelity-research-frt4-sut/images/1968368/

This Entree looks well built, has similar features, 3 tonearm inputs front switch, 3 optional impedance settings via front switch, several of them for sale.

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=entre+ET-100&...
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Range of options varies, sometimes specific knowledge of values are unknown.

i.e. I just bought this inexpensive phono stage to try for my office

https://www.amazon.com/iFi-Preamp-Turntables-Record-Players/dp/B08H2GPD7F/ref=sr_1_1_sspa?dchild=1&a...

1 input; 4 settings: MM; MC High; MC Low; MC Very Low.

Inside package, some specifics not found online:
MM: greater than 2mV
MC High: less 2mV
MC Low: less than .5mV
MC Very Low: less than .25 mV

I’ll be hooking up this iFi tomorrow in main system, straight to the Cayin, skipping the Mx110z phono stage, comparing it to the Fidelity Research SUT to the mx110z then to the Cayin.

Like it? Up to the office so I can use MC there eventually.

Not, Amazon easy refund.

OP,

Not to be against your original idea which I have no recommendation for, just to clarify:

You seem to be both tempted by and concerned about separate SUT. I was too. I avoided MC for many years, because of noise of early pre-pre transformers. That problem's gone.

SUT's have no power, they simply have internal transformers, some with optional resistances. Well built ones have no hum. I put mine next to this and that, just to see, I cannot get any hum out of it.