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

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

Richard, DF5SL

with the 14-El-Yagi at the BBT, a contest for lightweight- QRP-stations

vy cold job, hi.....

 

Elements and radiator mounted on the down side of the boom . A good solution without any disadvantage.

Element

Element-Position

Element-Length (8mm) Element-Length (6mm)

Ref

0mm 336mm 336mm
Rad 115mm 322 (12mm) 323 (12mm)

D1

175mm 309mm 313mm

D2

340mm 294mm 299mm

D3

565mm 287mm 292mm

D4

830mm 280mm 285mm

D5

1115mm 276mm 281mm

D6

1410mm 273mm 278mm

D7

1705mm 272mm 277mm

D8

2000mm 270mm 275mm

D9

2300mm 270mm 275mm

D10

2595mm 272mm 277mm

D11

2860mm 280mm 285mm

D12

3085mm 266mm 271mm

Gain 432MHz = 14,66dBd

3dB-angle hor = 25,8

3dB-angle ver = 27,0

Feedpoint: 28 +/-j0 Ohm at 432MHz

Stacking distance 1,50m vertical

Horizontal pattern 432MHz

Vertical pattern  432 MHz