View Single Post
  #16   Report Post  
Old September 17th 07, 11:34 PM posted to rec.radio.amateur.antenna
[email protected] nm5k@wt.net is offline
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 757
Default 10 meter antenna and radiation angles

On Sep 15, 12:05 pm, Denno wrote:
Yes, you all pretty much confirmed my suspicions. I may try to set up
a dipole low to the ground NVIS style, but I know it's probably a
waste of time.


I think you would be better off with a good vertical or ground plane.
There is not much point in running the typical "NVIS" antenna on
10m. There will be very few cases where the signal actually goes
straight up and down. Just doesn't happen on 10 much.
A low dipole will be the pits for most of the usual paths you
would work on 10m. It will be semi ok working skywave across
the country, but the good ground plane would likely be even
better. Probably by several db...
The ground/space wave with the low dipole will be half useless,
and much of the activity you will find on 10 will be fairly local at
times. In this case, the GP will smoke the dipole.
I used to hang out on 10 a lot several years ago, and if I had to
choose a single simple antenna, I'd use a good vertical or ground
plane as high as I could get it.
This will give the best overall performance for all the types of
paths you will likely work on 10m.
If you did get some short skip going, which is more likely
to be back scatter, or aurora, etc, the vertical will still do
the job as most will still be at a fairly low overall angles, unlike
the typical NVIS on 80m, etc.. There is very little true NVIS
on 10m. The skip zone is too long, even when it's short for
10..
MK