At wits' end with radio through the speakers!

I once had this and used a handful of "rf coils" that snapped onto the rca cables. The things were a little less than an inch long and I just put them at random places on the phono cables. It fixed my issue

The ferrite rings might help. Let us know. Short of moving to West Virginia, you might try enclosing your phono stage in a sort of faraday box. It’s impractical to do a true faraday box, but you might encase it in shielding as much as that is possible without hindering your access.

I have noticed after purchasing a Manley Chinook SE MK2 I am hearing  radio stations. However, it is only coming through when the tonearm is sitting on the tonearm rest. Once I lift it up it stops. 

In addition, like the original post my previous phono preamps did not experience this interference either. 

I had a LIO DHT and was hearing radio stations when the amp was turned on. I added a ferrite ring to the the speaker cable close to the amp and the problem went away. 

I bought them on Amazon for $8. 

I had radio pickup when I bought a Naim Superline phonostage, mostly in Russian. A 1nf loading plug (in parallel with the resistive load) reduced the level to where I could live with it but I could never eliminate it until I swapped out the steel framed rack for one made largely of wood, I can only hypothesise that the old rack was acting like an aerial element and focusing the signal but I’d tried earthing it to no avail.