View Single Post
  #1   Report Post  
Old February 28th 05, 05:33 PM
 
Posts: n/a
Default Proper Phasing of two Andrew DB224 Antennas

right me old Hubert, don't know what the grief is for? The bloke asked a
simple antenna question!

If you take and erect at ground level, two 1/4 wave vertical antenna
elements,
spaced 1/2 wavelength apart.
Install a good radial earth.
Fit both vertical elements with 1/4 wavelengths pieces of 50 ohm coax cable,
Take both cables to a, 2 female / 1 male, pl259 T piece, in the middle at
1/4 wavelength .
The T out cable goes to rig.
Then take a 1/2 wave piece of coax with a PL female plug on one end, and a
male on the other.
Insert this 'stub' between the vertical element and the T piece.
this make one side of the array feeder, 1/2 wavelength longer, making it 3/4
wavelength,
this will alter phase and direction from end fire, to broadside.

Clear as mud?