TO THOSE WHO WANT TO COMPARE THE 516 AND THE K2/K1 BOTH THOSE RADIOS ARE VERY DIFFERENT BREED. ITS LIKE COMPARING APPLES TO ORANGES. NOW IF YOU COMPARE THE K2 WITH THE ORION, BOTH ARE IN THE SAME FIELD. GO TO THE ELECRAFT WEBSITE REGARDING COMPARISON ON THE RADIO SPECS ITSELF. Ron wb1hga (darn shift key :)