On Jul 14, 2007, at 6:06 AM, JT Croteau wrote:
> On 7/14/07, Nate Duehr <nate@natetech.com> wrote:
>> I'm sitting here trying to figure out how 6" of mast sticking up
>> above the center of a yagi or loop is going to push anything out of
>> the way? The antenna is going to stick out feet in front of the
>> mast.
>
> Not when the loop is pointing backwards.
That's how my top 6m loop is, and it still sticks out a couple of
inches in front of the mast, exposing the most vulnerable place on
the antenna (the connection from the RF connector across to the other
side of the loop). In my experience, that is the first thing hit by
anything low-hanging like small branches. I've folded it down to
pick out leaves two or three times now.
The mast does nothing to keep that area of the antenna from getting
hit by anything.
I was actually interested in what the original poster meant by
extending the mast above the antennas keeping them from being hit by
branches. In my rover setup, it doesn't work. The top of my mast
is 12' high total, and the 6m loop on top is about 2" down.
I've had zero problems other than in my very own neighborhood where
the neighbors and city don't keep the trees trimmed up. No big deal,
just drive down the center of the street in the neighborhood, and all
is well. Lowest bridge I've seen was 12' 9" on a back-road. (Yeah,
I still flinched and slowed down. GRIN...)
--
Nate Duehr, WY0X
nate@natetech.com
_______________________________________________
VHFcontesting mailing list
VHFcontesting@contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting
|