Construction Details

4-El.-28-Ohm 0,35m

5-El.-28-Ohm 0,65m

6-El-28-Ohm 0,85m

7-El-28-Ohm 1,0m

9-El.-28-Ohm 1,5m

10-El.-28-Ohm 2,0m

 

7-Element-  

28-Ohm-Yagi 

for 70cm

 

The 8 x 7-Element-

Contest-group

by

Dirk,  ON5GS

 

Left: The 4x7-Element-Group of  Werner, DJ9KH

The SWR of a single Yagi

Gain 432MHz = 10,5 dBd

3dB-angle hor = 42,8

3dB-angle ver = 49,4

Feedpoint 28 Ohm at 433MHz

The Yagi

built by DH3FAW

 

Werner,  DJ9KH

has mounted the socket behind the reflector.The boom consists of flat aluminium and will be arranged in front of the mast.

 

Element

Elementposition

10mm

8mm

Ref

0mm

342mm

343mm

Rad

105mm

328mm (10mm)

D1

155mm

306mm

310mm

D2

305mm

293mm

297mm

D3

520mm

284mm

288mm

D4

770mm

285mm

289mm

D5

960mm

275mm

280mm

Horizontal pattern at 432 MHz

Vertical pattern at 432 MHz