[TowerTalk] "J" poles array question

[lito@rpp.com.pe (AUGUSTO YIPMANTIN )]

** Proprietary **

To the group,

can any body tell me how to measure gain and irradiation pattern of an 4 "J" 
poles array placed in a single towe, spaced 0.8 wavelength each one of the 
other and connected like the followin diagram:

                     cable "a"
             J--------------+
                             |                cable "b"
                             +-----------------------+
                             |                         |
             J--------------+                        |
                                                       |
                                                      += feed poinf
             J--------------+                        |
                             |                         |
                             +-----------------------+
                             |
             J--------------+

cable "a" (RG-11) length : (5 * 300/f)(0.66)(0.25)
cable "b" (RG-11) length : (7 * 300/f)(0.66)(0.25)

suppose f=146 MHz. or 430 MHz.

Augusto, OA4CVT


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