Can I use a step up transformer?

Hi everyone :-) I am currently using a .3mv cartridge (Dynavector 20x2) with a phono pre amp (Manley chinook) that only has a 60db output for LOMC, I am not getting the gain I would like, I feel like I am at the boundries of over loading my tube linestage (Manley Jumbo Shrimp) with the volume at 3:00 o clock position.Would this kind of a device even help fix this issue? Where does it hook up?  Assuming it would.... And If you wanted to spend under $2000 for one, can you recommend one that should work well with my system?

Thanks

Matt M