Construction  12-Ele.-28-Ohm 13-Ele.-28-Ohm 14-Ele-28-Ohm 16-Ele.-28-Ohm
17-Ele.-28-Ohm 19-Ele.-28-Ohm 21-Ele.-28-Ohm 23-Ele.-28-Ohm 27-Ele.-28-Ohm

23-Element-28Ohm- DK7ZB-Yagi for 432MHz

Gain 16,9 dBd            Boom 5,7 m

updated data 18-July-2010

Group of 8x23-Element-Yagis stacked at 

HA5KDQ

 

QTH in JN97LN, 500m high

Tnx photos to Simon, HA5IW

 

The Yagi built by Sandro, DD3SP

 

 

 

The 23-El.-Yagi is assembled by 

Graeme, VK3GOM

 and crew.

He reports from good performance and F/B and pattern similiar to the plotted pictures.

SWR <= 1.2 between 432 and 433 MHz

 

4x23-Element

Best stacking distances 2,05m vertical, 2,10m horizontal

Contest-Team OL6R

Photo: Jarek, OK2BJL

Gain 23dBd without stacking losses

Beamwidth:

For 3dB 8,8° hor , 8,8°ver

Measured SWR of a single 23-Element-Yagi

Kontest-Team OL6R

4x23-El.-Yagi 

at Clubstation

SP3YDE

(Tnx Foto to Dariusz, SP3TLJ)

 

The EME-Group of

 Mario, EB5HRZ

 

4x12.-El.-144 MHz

4x7-El.-144 MHz

4x23-El.-432 MHz

 

A very good solution ist the mounting of 4x7-El.-Yagi vertical in front of the stacking harness. So Mario needs no glassfibre for the boom and has an x-pol antenna!

Element

El.-Position

El.-Length (10 mm)

El.-Length (8mm)

Ref

0mm

338 mm

339 mm

Rad

115 mm

319 mm (12 mm)

321mm (12mm)

D1

185 mm

302 mm

307mm

D2

355 mm

290 mm

294mm

D3

585 mm

281 mm

285mm

D4

855 mm

274 mm

279mm

D5

1135 mm

271 mm

276mm

D6

1430 mm

268 mm

273mm

D7

1725 mm

267 mm

272mm

D8

2025 mm

264 mm

269mm

D9

2325 mm

263 mm

268mm

D10

2625 mm

261 mm

267mm

D11

2930 mm

259 mm

266mm

D12

3235 mm

257 mm

264mm

D13

3540 mm

257 mm

264mm

D14

3845 mm

257 mm

262mm

D15

4150 mm

258 mm

262mm

D16

4445 mm

257 mm

262mm

D17

4730 mm

258 mm

263mm

D18

4995 mm

258 mm

263mm

D19

5220 mm

257 mm

262mm

D20

5470 mm

260 mm

263mm

D21

5670 mm

257 mm

262mm