Hum with TAK CU phono cable

Kimber TAK CU are purpose built low capacitance phono cables. If you are using a MM cartridge that matters. You will experience sound quality degradation with MM cartridge and higher capacitance cables. If you’re using moving coil, capacitance has no effect. 

Honestly, having experience with Mogami and Kimber, they’re not comparable. Kimber is much better. If you hear slight hum at volumes beyond normal listening levels, and it’s only when music isn’t playing, I would leave the kimbers in. But it’s your system. So it’s up to you. 
 

When you compare mogami and TAK CU make sure you pay attention not only to how treble or bass sounds, but to how musically engaging the presentation is. Usually takes about one side of LP. Play a full side with kimber then again with mogami. If absolutely nothing is different or mogami is as good as kimber, return the TAK CU. 

When it comes to phono hum, you just have to experiment. Especially with a SUT in the mix. I have a couple of the Pangea ground cables hanging around because they're good quality, and it's good to experiment with a free ground cable. 

Turn your system on, mute off, put volume to a low-ish reasonable level so you can *just* hear the problem hum (lower than usual listening level - you don't want to cause any nasty high-level pops) and firmly but loosely (just contact-based) connect the ground cable to various contact points to see if you can find the magic quiet configuration. 

With my SOTA table I need to use the DIN phono cables's integrated ground (to arm) PLUS a separate ground cable tied to table chassis/bearing - both then tied to SUT on other end. When I had an RCA / RCA phono cable with separate integrated ground (spades on both ends - probably just like your cable), coming out of SUT, it was always a mixed bag:

• Sometimes tying both spades (SUT and phono input) was quietest
• Sometimes tying neither spade worked
• Sometimes typing ONE end (usually SUT side) worked best. This is generally a "best bet" and replicates the typical shielded RCA cable having its shield tied to ground on SOURCE end only (arrows point AWAY from source end). The SUT chassis becomes the main ground reference in this scheme

Thank you all , I really love the sound of the kimber , it’s something I will have to I I will have to get use to the small amount of hum. 

Also if you have your phono stage plugged into another circuit from where your preamp or integrated amp draws power, it may cause hum due to ground loop. 

@chrisocr have you tried what I suggested above? To have the phono stage run out of the same outlet/circuit as your preamp or integrated? That’s should clear out the hum.