As I thought. That 47K input impedance will definitely load down the tuner and the phono output, and monkey with the RIAA response of the phono preamps as well. If you install the buffer stage to enable the Preamp output jacks, it will have no trouble driving your EQ unit.
Dave
I never provided a parts/build list -- just a schematic, although other members may have developed one. A 5W resistor will work just fine, since the size of modern components much smaller than the old style component I used. As for availability of the FET, google Component Search, which shows that nearly 4700 pieces are still available. There were no updates for the schematics posted after the original designs were published.
Dave