[Elecraft] RX antenna protection

[W1PEF]

I am considering a Rx antenna but my property is small and concerned about strong signals over powering the receiver. Does the K3S have built-in protection?
Does anyone use a loop receive antenna or BOG antenna ... would like some recommendations from actual users of receive antennas.
Have the complete K-Line and would like to improve my ability to hear. 
Thanks for any advice...
Paul
W1PEF