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

 

5-Element-28-Ohm-Yagi for 70 cm

A second Yagi with 50 Ohm and 430-440 MHz see down!

8x5-El.-28Ohm-Yagi at Contest-Crew DF0RW

 

 

Data of a single Yagi:

Gain 432MHz = 9,1 dBd

3dB-angle hor = 48,0

3dB-angle ver = 58,2

Feedpoint 28Ohm at 432MHz

 

Element

Elementposition

8mm

6mm

Ref

0mm

334mm

336mm

Rad

135mm

308mm (10mm)

307mm (10mm)

D1

260mm

297mm

301mm

D2

460mm

292mm

296mm

D3

630mm

284mm

288mm

Horizontal pattern at 432MHz

 

Vertical pattern at 432 MHz

 

5-Element-50-Ohm-Yagi for 70 cm

Broadband Yagi for use on 430-440 MHz, Gain 8,7 dBd

Patterns for the different frequencies in the 70-cm-Band

The Yagi was not designed for DX-use, it is an uncritical Allmode-Yagi easy to build. Use a coax-choke for feeding: 3 turns RG178 on 20-mm-PVC-tube.

Element-Lengths and Positions

Element Position 6 mm 4 mm 3,2 mm
Ref 0 mm 332 mm 334 mm 335 mm
Rad 155 mm 323 mm 325 mm 326 mm (4mm)
Dir 1 238 mm 298 mm 303 mm 306 mm
Dir 2 420 mm 296 mm 301 mm 304 mm
Dir 3 590 mm 286 mm 292 mm 295 mm