[Mobile-Portable] Mobile Antennas

[WCJamison]

Dave:

Thanks for your reply.  I have modeled many J-Pole combinations and haven't 
been able to come up with a combination that would be an improvement on the 
1/4 wave Marconi.  The J-Pole would be too long for top of cab mounting.  You 
have confirmed what I have concluded about cab mounted dual band mobile 
antennas.

  walt, W7PRB

On Monday 19 July 2004 07:46, W6OAL at aol.com wrote:
> Walt,
>
>     You're correct. If you are using a vertical (common quarter wavelength)
> the Brewester angle is going to be quite great. For a dual bander you might
> try a "J" for 2M which will work OK also on 70cm. This will put your main
> lobe on the horizon as it is essentially a dipole. As for gain in a mobile
> application that is going to be hard to come by. You need a long yagi and
> you need height to get the main lobe on the horizon. Neither of these come
> easy in a mobile setting, and having it dual band - further not easy! If
> you can live with a 5 dBi omni that will operate on both 2M and 70cm the
> "J" is the answer.
>
> GL CU 73, Dave...
>
> Olde Antenna Lab of Denver
> Dr. David A. Clingerman, ScD (CEO)
> ----
> Your Moderator: Dick Flanagan K7VC, mobile-portable-owner at mailman.qth.net

-- 
------  Walt Jamison, PE   wcjamison at jps.net  ------