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

 

 

9-Ele.-28-Ohm-DK7ZB-Yagi 

5,00 m Boom, Gain 12.5 dBd

The picture shows the antenna at PD0B, for more construction details see:

www.pd0b.nl

The 4 x 9 El.-Group

built by

Kirk,  VK2MER

4x9-Element stacked by Oene, PA3CWN

He is working EME with the group in H-configuration.

2x9-El.-stacked by Tibor, HA1WA       

2x9-Element stacked

by Peter, PA4PS

 

Stacking distance 3,50m

 

More information about the construction at his website:

PA4PS

 

From 8-25 June-2007 Peter, PA3CNX and Rene, PE1L had an EME-activity from Bonaire (PJ4)

Result: 273 EME-QSOs and 51 DXCC             Link to PJ4EME

The antennas are 50/200-Ohm modified Yagis with folded dipoles for WIMO           Link to WIMO

(The 28-Ohm-Yagi has a slightly better performance!)

2x9-El.-Yagi

 by  Mark, CT1JFC

 

EME with 90Wtts into 

35m coax and 2 Yagis

Anatoly, UN7BBJ

with his 9-El.-Yagis

Element-lengths in mm for the 28-Ohm-Yagi. It is recommended to use the 10mm, 8mm or 6mm elements for best results.

 4mm-elements have more losses, lower gain and the bandwidth is smaller.

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

Updated with 12.7 mm (1/2 inch) elements 08-Sept-2009, updated with 9,5 mm (3/8 inch) 25-Apr-2010

Diam. Ref Rad D 1 D 2 D 3 D 4 D 5 D 6 D 7
12.7 mm 1017 mm 965 (12.7 mm) 930 mm 900 mm 882 mm 873 mm 864 mm 880 mm 864 mm
10 mm 1017 mm 972 (10 mm) 939 mm 909 mm 892 mm 883 mm 874 mm 890 mm 874 mm
9.5 mm 1018 mm 973 (9.5 mm) 941 mm 911 mm 894 mm 885 mm 876 mm 892 mm 876 mm
8 mm 1020 mm 977 (8 mm) 947 mm 917 mm 902 mm 891 mm 882 mm 898 mm 882 mm
6 mm 1024 mm 983 (6 mm) 953 mm 925 mm 910 mm 899 mm 892 mm 906 mm 890 mm
4 mm 1028 mm 989 (4 mm) 963 mm 936 mm 922 mm 912 mm 906 mm 918 mm 905 mm

Element-positions

Ref Rad D 1 D 2 D 3 D 4 D 5 D 6 D 7
0 mm 345 mm 615 mm 1175 mm 1870 mm 2675 mm 3505 mm 4345 mm 4980 mm

Current-profile

Plots for 144,3MHz with EZNEC +5