On Mar 24, 7:59*am, "D@LS" / wrote:
On 24 Mar 2011 14:50:42 GMT, Allodoxaphobia

wrote:
On Wed, 23 Mar 2011 20:05:55 -0400, D@LS wrote:
Does anyone know the Radiation Angle of these antenna's *(Cushcraft
A3S/A743) at 33 feet or if there is a formula to calculate it ?

Different operating frequencies = different answers.

28,300 - 21,300 - 14,200 - 7,175

Are you looking for a comparison between the antennas? For most
horizontally polarized low/medium gain antennas (which those are), the
vertical (elevation) pattern is going to be almost entirely determined
by the height above ground (so there won't be much difference)..

There is a formula (which I can't recall off the top of my head) which
would give you the elevation angle of maximum gain for a given
height. You might want to invest in a copy of the ARRL Antenna Book,
which includes a program called HFTA which does the calculations and
lets you do a lot of cut and try.