i was wondering.. ... currently i have a horz center fed dipole it's
not big but my roofside sgc at least keeps the swr's nice.

it's about 20ft off the surface of my roof wich is about 175ft off the
ground ...


i was thinking about adding a verticle antenna such as the
challanger(gap) or such...



what i ponder is what if any improvements i might see over the dipole
or if under what 'conditions' it might be better --if at all??


tnx