The ornamental design for a desktopradio, as shown and described.
FIG. 1 is a front perspective view showing the desktop radio of the present invention;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of the numbers, buttons and various features are included for the purpose of illustrating environmental structure and forms no part of the claimed design.