Construction details 9-Ele.-28-Ohm 10-Ele-28-Ohm 11-Ele-28-Ohm 12-Ele.-28-Ohm
13-Ele.-28-Ohm 14-Ele.-28-Ohm 17-Ele.-28-Ohm 19-Ele.-28-Ohm  

14-Ele.-28-Ohm-DK7ZB-Yagi (9,90m Boom)

Updated 31-July-2009 for better bandwidth and matching

Gain 15,1 dBd            F/B 28 dB

 

Bandwidth for -3dB:

hor 25°, ver 26,2°

 

Stacking hor = 4,70 m, ver = 4,50 m

 

 

The 14-Element-28Ohm-Yagi, built by  RK3AF

The 14-Element-28Ohm-Yagi, built by Martin,  OK2FKF

New dimensions, see old data below! The elements are a little bit shorter now, it is possible to change the old to the new design. Element positions are the same! It is highly recommended to use 8 mm or 10 mm elements for better bandwidth and better behaviour under wet conditions. Old data further down.

Element-lengths ( Rad 12mm) in mm

The given length of the radiator element is from tip to tip, including 10mm spacing for the insulated part.

  Ref Rad D 1 D 2 D 3 D 4  D 5 D 6 D 7 D 8 D 9 D 10 D 11 D 12
10 mm 1016 964 946 914 892 879 868 860 856 852 852 853 860 860
3/8" 1016 964 948 916 894 881 870 862 858 854 854 855 862 862
8 mm 1020 967 952 922 900 887 876 868 864 862 862 861 868 868
6 mm 1024 970 959 930 909 896 884 877 873 871 871 869 877 877
5 mm 1024 974 963 936 914 991 889 882 878 876 876 874 882 882

Element-positions in mm

Ref Rad D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8 D 9 D 10 D 11 D 12
0mm 415 670 1215 1925 2740 3620 4530 5455 6380 7300 8205 9100 9830

Old design from 2003:

Element-lengths ( Rad 12mm) in mm

The given length of the radiator element is from tip to tip, including 10mm spacing for the insulated part.

  Ref Rad D 1 D 2 D 3 D 4  D 5 D 6 D 7 D 8 D 9 D 10 D 11 D 12
10mm 1024 972 946 919 897 883 872 864 860 856 856 857 864 864
8mm 1026 972 952 926 904 891 880 872 868 864 864 865 872 872
6mm 1028 972 958 933 912 900 889 882 878 874 874 875 882 882
4mm 1030 972 966 942 922 910 900 893 889 886 886 886 893 893

Element-positions in mm

Ref Rad D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8 D 9 D 10 D 11 D 12
0mm 415 670 1215 1925 2740 3620 4530 5455 6380 7300 8205 9100 9830