On Tue, 13 Oct 2009 22:24:06 -0400, "Steve"
wrote:

Hello,
I want to put an antenna on a -fiberglass- motorhome (class a) and I'm not
sure about the no gound plane vs the regular mobile antenna choices. I have
a ladder
rack on the back, and a luggage rack on top, but I'm not sure of how much
ground I can get from that.

I have a 102" whip laying around and I thought about mounting that to the
back bumber with a homemade plastic 'standoff' at the top of the motorhome
to keep it from swinging.

Good idea, or no? (tree pruner is not what i want) but from the bumper I can
use most of that 9' before it clears the roof on a fiberglass body.

Strange combo.

Mounting an antenna on the side or back of a motorhome can be
ineffective in some directions. You really need to have an antenna
as free of obstructions as possible.

The best choice for a lack of ground plane is a set of dual antennas.
Something like this: click on dual antenna kit
http://www.firestik.com/CatalogFrame.htm

Or for a single antenna:
http://www.firestik.com/Catalog/e30-ngp.htm

More info:
http://www.rightchannelradios.com/ng...cb-antenna-75/