We will have other antennas side mounted but locked into 2 other positions (for a total of 3 positions). Only one leg at the top can it be mounted on. The mount is not far enough from the tower to consider a hanging antenna. Robert
--- In Repeater-Builder@yahoogroups.com, Kris Kirby <k...@...> wrote: > > On Tue, 24 Mar 2009, georgiaskywarn wrote: > > How close can these antennas be placed in the same horizontal plane? > > These antennas would be placed at the top of a tower on one leg. > > > > > > A) db224 on 2mtrs and db224 on 220mhz > > > > or > > > > B) db224 on 2mtrs and db420 on 440mhz > > In mobile mounting, I've been told that you want to be 1/4 wavelength > apart at the lower frequency. For commercial installations (i.e.: fixed > base), I think one wavelength is supposed to get you outside of > impacting the beam by altering the near-field. > > That isn't to say that you won't impact the far-field. > > If the tower is large enough, you might consider putting the two meter > DB-224 on top, and the 220MHz DB-224 off one side. > > -- > Kris Kirby, KE4AHR > Disinformation Analyst >
