Dave,

Why not mount the antenna in the middle of a sheet of plywood (painted if
you want), and staple 4 wire radials for 2 and 4 radials for 440 on to the
plywood. A 3 foot square piece is more than large enough if you run the 2m
radials towards the corners.

Tam/WB2TT
"Dave J." wrote in message
...
2 Meter / 440 question.

I have an RV with a fiberglass roof and a luggage rack on top of the
roof. I'd like to use the luggage rack as an antenna mount point since
there's really no other place to attach a mobile antenna if it needs a
ground plane.

But I doubt if the rack is grounded to the vehicle frame. Should I
bother running some ground braid down to the frame or will the coaxes
shield itself provide enough ground to allow normal antenna
performance.

Thanks.

Dave