step up transformer for clearaudio

I am quite a supporter for SUT, but only for LOMC.
A SUT suits the chain the better the lower the output of the MC and its source impedance (and the resulting source inductance).
You may try a 1:4 step up with 8 to 12dB gain.
This might work well and tell you a few things about your MC. But the question is - as Axel pointed out - whether your phono stage can handle the input.
Always keep in mind, that the SUT and the cartridge are a team. You need to match the right "teammates" - otherwise the "best" SUT will sound terrible with the "best" MC if their technical parameters aren't matching.

Hi Csr827, it will be obvious audible if you overload the input. The sound will be unbearable thin, distorted and somehow "breathless" (in a most negative sense of the word) and it will be obvious that something is entirely "wrong".

Get the manufacturer contacted and ask him about the maximum allowed input voltage in the phono input.
He should know the answer within 5 seconds, as this is one of the key parameters of any phono stage worth the name.

But please keep in mind, that the influence of a SUT is diminishing with increased source output of the MC. You already have a medium to high output MC. Don't expect even a well matched SUT to make a difference like night and day. What you will get is increased dynamic, punch and "inner gain" (in the sense of more power, as if you are running your car with the next more powerful engine..).
But these effects will be rather small.

Dear Larry, dear Raul,
I am using special bipolar Class A amplifiers, special FET SE-amplifiers, super regulated heater supply with L-power supply triode only preamplifier with SUT.
So we have most all kinds of active and passive amplification married happy together in my set-up.
Raul will certainly agree that the most advanced SUTs today do add as little coloration, distortion and phase shift to the music as the majority of the better solid-sate-amplifiers available today.

A good SUT is only a good SUT if it is the "right" SUT for the given cartridge.
And only then.