[TowerTalk] Phased Verticals

[Bill]

Another source for phased vertical information is in a Telex-HyGain Engineering report entitled "Phased Multi-Band Verticals for Additional Gain and Low Angle Radiation."  The report is undated but contains designs for 2 and 3 element phasing systems showing the patterns and switching configurations.  In the report the 3 antenna system is shown with the antennas placed at the corners of an equilateral triangle with each side of the triangle being 1/4 wavelength.  In this configuration the report states that for the three antenna configuration a 60 degree pattern can be switched in six selectable directions.  Note that the cardioid pattern shown in the report for the two antenna system is not totally correct (it shows a point in the gain direction) and it does not show patterns for the three element array.

I have used the two antenna design successfully by mounting two 14 AVQs on the metal roof of my workshop and switching in a quarter wavelength of coax with a remote relay box to reverse the direction of the cardioid or to produce a broadside signal..

73

Bill
W7VP