Dear @backwash : You own an integrated unit that seems a good one.
For the posts I can see that no one owned the original Ortofon MC10. I owned and after the Denonn 103 the MC10 was my true " first " LOMC cartridge with really high quality level performance, so you don’t need to change it due that you said that your uncle almost not used.
Your manufacturer says that the phono stage can handled MM and HO MC cartridges and your Ortofon MC10 is a LOMC cartridge so you will need an external SUT as the Denon AU-340 that you can buy through ebay. This step up transformer is of very high quality even that the model is a vintage one, I still own this Denon 340 and comes with the needed rigth gain for the MC10.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

