[NLRS] K0MHC/R June VHF Test Summary

[John P. Toscano]

Jim:

I took a look at your antenna configuration for the June 2013 VHF 
contest. One thought to consider is that you stacked the two 432 MHz 
antennas side-by-side. While this should increase gain and F/B ratio, it 
also narrows the beam width, making pointing more critical. If you had 
stacked the antennas vertically, you should get the same gain and F/B 
but keep the full beam width of a single antenna. Stacking vertically 
tends to suppress the lobes that point up, which you don't want in the 
first place.

This may be a moot point since it sounds like your next project is to 
stack four 70cm antennas. In that case, an H frame with two vertically 
on the left and two vertically on the right to make the total of four 
would be the most reasonable from a space perspective. Another (remote) 
possibility would be to make an H frame with 4 stacked 70cm antennas on 
the left to maximize gain and beam width, and two stacked 2M antennas on 
the right, since they need to be spaced further apart than the 70cm 
antennas. Probably the total height of the 70cm stack on the left and 
the 2M stack on the right would be about the same. Of course, that is a 
LOT of aluminum up in the air for a rover, particularly if you still 
plan to include 50 and 222 MHz bands, and/or any of the looper bands.

Thanks for the few Q's that we were able to make in the contest. Sorry 
it could not have been more. Best of luck with your further preparations.

73 de W0JT, John P. Toscano
EN34js June-September
EL09ro October-May

On 6/14/2013 9:28 PM,  Jim Froemke wrote:
>
>
> All of the details are here including the "Dunk-a-Rover Challenge" video:
>
> http://k0mhc.blogspot.com/2013/05/vucc-expedition-to-fringe-grids-within.htm
> l
>
>
>
> or go to http://k0mhc.blogspot.com/ and chose the "VUCC Expedition to the
> Red River Valley" option in the menu
>
>
>
> or enter "K0MHC rover" into the Google search engine.
>
>
>
> Thanks to all who participated in the June VHF event. I learned about a lot
> from you about areas for improvement for next time!
>
> 73, Jim
>
> K0MHC/Rover
>
> "Some assembly (and batteries) required"
>
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