"I do have an extremely nice vintage Hirata Tango step up transformer that offers 1:6.6 ratio. There are times when I get no hum and then other times when I do... it can be frustrating at times.... but when there is no hum - it’s simply stunning!"
That means the sound of your MM Phono is stunning. That is why I use a SUT, to keep using my beloved McIntosh tube preamp mx110z's MM Phono EQ.
You simply MUST find a hum free location for the SUT, put it inside an isolation box ,,,,, different length or type of cables ..... Don’t walk away from ’stunning’.
Your cartridge's impedance is 38 ohms, they say it should see around a 400 ohm load (that fits the formula 38 x 10 = 380 ohms).
That cartridge: you might need a unit that provides separate control of gain and impedance. My Fidelity Research FRT-4 SUT (gain and impedance are a 'resultant' relationship) to 'get' 470 ohm load, it would be x factor of 10.55 which may be too much signal.
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