4Elements Yagi

Info for amatorial costruction :

Yagi antenna , all elements grounded to the boom
Center frequency  27.530 (27.300 at 27.800)
Gain (dbi) 9.4 (at 6Mt hight the gain is 13.8 & at 12Mt is 14.6)
Front to back (db)  28
Turn radius  3.95 Mt  (13')
Boom lenght  5.00 Mt  (16' 4")
Elements (diameter average)  16 mm  (5/8") 
Boom (diameter) Max. 50 mm  (2")

Reflector  :   5.50 Mt  (216 3/4")                   Space Ref. to Driv. is :   1.61 Mt  (63 3/8")
Driven  :   5.30 Mt  (208 5/8")                       Space Driv. to First Dir. is :   1.143 Mt   (45")
First Director  :   5.20 Mt   (204 3/4")            Space First Dir to Second Dir. is :    2.19 Mt   (86 5/8")
Second Director  :   4.79 Mt  (188 1/2")                                               (center to center element)