As others have mentioned, you should have used the Foundation phono cable designed specifically for that application, not their line-level interconnect. The cable your presently have should be just fine in downstream applications. By contrast, Audioquest (and probably Monster?) takes more of a one-size-fits-all shield the crap out of everything approach to their cables. I like both AQ and SR cables. In my systems, I have not found the extra shielding to be necessary.
I have the SR Foundation phono cable on my 2 tonearm table alongside an Audioquest WEL Signature LP cable (their top of the line $4K cable), and it acquits itself very well in that matchup. No noise issues at all -- extremely quite phono cable, even with lo-MC cartridges (it’s actually on my 0.3mV Koetsu Blue Lace, which is my best sounding cartridge). The line level Foundation RCA and XLR also work perfectly downstream in this same system.