Had to look-TV, radio (and a phone jack)indeed are on a separate fuse,
huh, according to the schematic #7 15a fuse.
If you just replaced antenna, possibly it was on (powered antenna)and accidentally grounded during install. Or cause of ant. replacement pulled on cable and its shorted internally.
If fuse blown, unscrew the coax leading to antenna, & pull power wire at back of switch prior to inserting new. If fuse doesn't blow, reattach power lead to switch. If it doesn't blow reattach coax. If it doesn't blow-yer good. If fuse blows again you've a short Assuming Winegard..