Twin X-Mount Dipole Idea

[Lil'Yeshua]

NVIS Army antenna

Near Vertical Incidence Skywave (NVIS) Antennas - AS-2259/GR (Part 1) - YouTube

 

[Lil'Yeshua]

CBC is now shipping my order which includes plans for building a CP antenna,speech processor board and plans,and a choke to give my 959 more clarifier slide capability. I'll finally get the chance to study them to see how and why the antenna is to be built. The fun part would be to see if I can improve and modify the CP plans.





CBC International - books plans kits modifications repairs for CB radios

 

[Lil'Yeshua]

While I'm waiting for my plans,has anybody heard of these guys/girl?
11 Meters(CB)

 

[Lil'Yeshua]

I am wondering about some kind of ground plane for this antenna. Also,I wonder if orientated in a beam config,if I were to have the forward end of the boom tilted up a few degrees. Would that help especially in skip conditions?
http://www.hep.princeton.edu/~mcdonald/examples/groundplane.pdf
http://puhep1.princeton.edu/~mcdonald/examples/turnstile.pdf
http://www.cebik.com/lbc_signup.htm
http://www.w0ipl.net/ECom/NVIS/nvis.htm

 

[Lil'Yeshua]

The NVIS Antenna
http://www.w0ipl.net/ECom/NVIS/nvis2.htm
I'm thinking that since I'll be moving to the mountains that a NVIS type of antenna may work well but at what frequency? 10/11/12 meters?

 

[Lil'Yeshua]

Looks promising.

 

[Lil'Yeshua]

Interesting adjustable angle

 

[Lil'Yeshua]

NVIS for mobile operation
Mobile NVIS

 

[Mudfoot]

The NVIS Antenna
http://www.w0ipl.net/ECom/NVIS/nvis2.htm
I'm thinking that since I'll be moving to the mountains that a NVIS type of antenna may work well but at what frequency? 10/11/12 meters?

Your gonna need your general class license to use that antenna scheme.

 

[Mudfoot]

Interesting adjustable angle

I've treated a few individuals wounded by being whacked by HF whips on Jeeps.

Patricia Gibbons was very knowledgeable on military communications gear. Sadly, she passed a while back.

 

[Lil'Yeshua]

Your gonna need your general class license to use that antenna scheme.

Thanks. So, I finally found out what freqs that will work on a NVIS setup. Question answered. I looks neat for local comms up to say,200 miles out with the right conditions. The military uses a special radar to see if the signal will bounce off that ionization layer. I'm checking all of my mounting configuration options while I'm waiting for that CP Antenna plans I fore mentioned.
Question:what goes on on 40&80 meters?
P.S. The study material I've read and posted those links says that all antennas possess some of NVIS characteristics. Since one half of my antenna will be a horizontally orientated dipole, I guess I will still get out pretty good. The vertical part will fire 90 degrees out of phase with the horizontal.
(75)

 

[Lil'Yeshua]

Crunchy nugget!?
Amateur Radio Antenna Projects

 

[ghz24]

CP yagis and nvis

NVIS wont work at 11 meter frequencies.
The crossed dipoles will function as planned , but contrary to what is spread all over the net adding a reflector (as in two yagis crossed and staggered or fed 90 degrees out of phase ) doesn't work right.

 

[The DB]

The NVIS Antenna
NVIS Antenna Mod's
I'm thinking that since I'll be moving to the mountains that a NVIS type of antenna may work well but at what frequency? 10/11/12 meters?

No it won't. Rarely do you see NVIS on any frequency higher than the 40 meter ham band (7 Mhz).


The DB

 

[Lil'Yeshua]

No it won't. Rarely do you see NVIS on any frequency higher than the 40 meter ham band (7 Mhz).


The DB

Thanks. In the articles I posted,I finally found that out. As of now I'm waiting for the CP antenna plans to arrive in the mail. I'm still planning on building a set of beams using circular polarization. At the very least build a twin dipole antenna with the 90 degree phasing coax's and mount orientate them horizontally. Should be good for local. I was also pondering on the idea of tilting the assembly at a angle to where 11 meters will reflect at a shallower angle. Maybe a motorized tilting platform.