Radio tuner
FIG. 1 is a front, bottom and right side perspective view of a radio tuner showing my new design; 
     FIG. 2 is a front elevational view thereof; 
     FIG. 3 is a right side elevational view thereof; 
     FIG. 4 is a top plan view thereof; 
     FIG. 5 is a rear elevational view thereof; 
     FIG. 6 is a left side elevational view thereof; 
     FIG. 7 is a bottom plan view thereof; and 
     FIG. 8 is a front perspective view of the tuner inserted into a cassette player, which is shown in broken lines for purposes of illustration only and which forms no part of the claimed design.