Topband: parasitic element

[John]

tq all the antenna guru's, been thinking of adding a parasitic element  to my existing 135 quarter wave vertical  to give me a little more gain to the NW my question would it work?the the quarter wave wire would be insulated from the top of the tower and sloping toward the NW and another insulator at the far sloping end and anchored to a tree...appreciate anyone's opinion..John K1GUN