Step one:
First draw an oval and two circles inside.
Step 2:
Draw half a square on top, notice there are two lines.
Step 3:
Then draw an arc to increase the thickness, and draw two squares inside for decoration.
Step 4:
Then draw a few more round buttons up and down.
Step 5:
Beside it, draw a radio antenna and some musical notes.
Step 6:
Finally, paint it with nice colors, and the radio is finished.