Many rover stations are using the Par Moxon with good results. It is a 2
element Yagi with the element ends bent toward each other so it "looks like" a
loop. The Moxon has gain over a dipole where a single loop has gain LESS than a
dipole. The Moxon is probably about 6dB better than a single halo. Of course
you have to POINT the Moxon, but unless you're doing a lot of operation while
in motion, that's not usually a problem. In either case (halo or Moxon), try to
get the the antenna as far off the ground as possible to keep the vertical lobe
on the horizon. A 6M antenna at 8 feet has the main lobe pointing way up off
the horizon and very little ON the horizon, that's why it works so well on
E-skip, especially short skip! I run my 2 element beam at about 16 feet on the
rover.. It probably wants more!
bill, K1DY
> From: glasbrenner@mindspring.com
> Date: Wed, 29 Oct 2014 21:04:19 -0400
> To: jarred.jackson@hotmail.com
> CC: vhfcontesting@contesting.com
> Subject: Re: [VHFcontesting] KU4AB 6m Loop vs. PAR Moxon
>
> AJ4LU and I used one for several run and gun rover ops, covering 20+ grids at
> 70 MPH. We even turned it in motion with no issues other than mounting it
> backwards the first time!
>
> 73, Drew KO4MA
>
> Sent from my iPad
>
> > On Oct 29, 2014, at 8:59 PM, Jarred Jackson <jarred.jackson@hotmail.com>
> > wrote:
> >
> > I have a 3 element yagi for 6m, but it seems a bit too much for me to take
> > out on the rover for contests. So in May I ordered a 6m loop from KU4AB
> > using the website. After months of waiting, a phone call, and several
> > emails, I gave up and consider my $87 lost. But this provided the
> > opportunity to look into other antennas and came across the PAR Moxon. The
> > company was very responsive and the antenna performs nearly as well as my
> > yagi. Its a bit bigger than the loop might have been, but it fits just fine
> > on the rover mast and has some gain. I have not yet experienced 60mph
> > highway speeds. If anyone has any experience with the PAR 6m Moxon in a
> > rover application I would like to know if it holds up or if I should take
> > the wire and side "sticks" off while traveling.
> >
> > Jarred - KF2MR
> >
> > _______________________________________________
> > VHFcontesting mailing list
> > VHFcontesting@contesting.com
> > http://lists.contesting.com/mailman/listinfo/vhfcontesting
> _______________________________________________
> VHFcontesting mailing list
> VHFcontesting@contesting.com
> http://lists.contesting.com/mailman/listinfo/vhfcontesting
_______________________________________________
VHFcontesting mailing list
VHFcontesting@contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting
|