On Sun, 30 Nov 2008 08:05:31 -0500, "Douglas W Adair"
wrote:

I like them two at a time--co-phased. Is there any gain to be had that way
or am I just skin pipe dreaming at the petro?


Not much on a big truck.
Since most of the usable cophased signal is blocked by the cab and
trailer. I've found a single antenna works just as good.

What hurts the system the most, is the factory installed crap.
They generally use the smaller 75ohm cable and use splice after splice
to make it work. I generally get my own cable, bypass their stuff.

One thing to remember in cophasing, cable length DOES make a
difference. If they are not equal, things will be out of whack. Unlike
in a single antenna where length is not an issue.

Oh and for all you loudmouths out there, the only reason they say you
must have x amount of feet, is to sell the damn cable.

In reality, the shorter the cable, the better off you are.

Have you held an FCC license for radio work?
I have.