Base Pattern Overlays for all but the A99 model and my Sigma 4 models I posted earlier.

[Marconi]

Here are the Pattern overlays. The symbol for the active model is noted by the (*)
The PDF Zoom feature at the top of the images allows for a closer look at the patterns and colors. Some patterns are hidden over by similar patterns in the group.

The Vector 4K shows the maximum gain among them all at 4.39 dbi at 8* degrees above the horizon.

I forgot to include my A99 model and my Sigma 4 model. The Sigma 4 model shows a gain = 4.18 dbi gain at 8* degrees.

The Green (o) shows the maximum gain at the lowest angle.

 

[Shadetree Mechanic]

Wow on the Vector 4k, that's really something. Really makes me want to get an antenalyzer and dial mine in. Thanks for sharing this.

 

[Marconi]

Wow on the Vector 4k, that's really something. Really makes me want to get an antenalyzer and dial mine in. Thanks for sharing this.

STM, I've owed an original Antenna Specialist version of the Sigma 4, but never a NewVector 4K. My S4 produces 4.18 dbi gain at 8* degrees. My model of the NV4K shows 4.39 dbi at 8* degrees.

This is such a small difference it would really be hard to tell the difference just using a radio and your signal meter.

Frankly with all those overlays as close together as they are...I doubt one would see a notable difference among any. This is why for years I have claimed I saw very little differences among the numerous CB vertcial mono-pole antennas I used and compared over the years.

My models just seem to support this too, but these are just my opinions and there are other situations at hand in setup that make more of a difference than most are will to consider...like Common Mode Current effects on the feed line an mast that can skew the patterns badly.

I attempt, in most cases, to watch these currents with my models and mitigate them when possible.

 

[Marconi]

Wow on the Vector 4k, that's really something. Really makes me want to get an antenalyzer and dial mine in. Thanks for sharing this.

Here we see the pattern with no CMC mitigation vs. my model with a Choke at the base of the antenna feed point. These simple steps in modeling are often ignored, simply because it is convenient to do a bare bones model and be done.

Check out the differences in the very high angle lobes produced here and then compare them to the overlays of the NV4K with a choke.

Also note the red line currents on the mast noted on Antenna image. If this was a feed line, the currents would also flow on the line and skew the antenna pattern.