@converge i’m assuming you’re replacing the interconnects between your phono stage and preamp/integrated?
I don’t think that’s the source of your problem. The root cause is most likely your phono stage, that would be the unit picking up the RF.
Can you list your components - turntable, arm, tonearm cables, cartridge and your phono stage? What cables are connecting the arm to phono? There are phono stages, like Schiit Mani for example, that are susceptible to picking up nearby radio stations. Could be that…