Details 2-El.-2m 3-El.-2m 4-El.-2m 5-El.-2m 6-El.-2m
7-El.-2m 7-El.-70cm 9-El.-70cm 10-El.-70cm 12-El.-70cm 14-El.-70cm
Stacked 5-El-2m 25-Ohm new 7-El.-2m  25+28-Ohm  new 8-El.-2m  28-Ohm new 10-El.-70cm  28-Ohm new

With the boomlength of 1m two different Yagis were realized: A 50-Ohm-Yagi with a PVC-Boom and a 28-Ohm-Yagi with a 16x1mm aluminium-boom and the DK7ZB-Match. Both Yagis have high gain and not a good F/B, but for most portable purposes it should be no disadvantage.The 28-Ohm-Yagi see down!

The 4-Element-2m-50Ohm-Yagi, Boom 100cm

Gain 7dBd, F/B 12dB

Weight only 240g with 3,2mm-elements!

You can use the Yagi on 432MHz with gain  > 4dBd ! Plot see down

 

 

3dB-angles: 58,0 hor, 81,6 ver

Vertical stacking distance 2,00m

The 4-Element-Yagi built by

Ondra, OK1CDJ

 

    Positions      

Lengths (2,4mm) Lengths (3,2mm) Lengths (4mm) Lengths (6mm)
Reflector 0mm 1022mm 1022mm 1020mm 1016mm
Radiator 260mm 977mm (4mm) 977mm (4mm) 977mm (4mm) 980mm (6mm)
Director 1 470mm 941mm 935mm 930mm 924mm
Director 2 985mm 921mm 915mm 910mm 890mm

For stacking use a distance of 2m, below the plots for 4 over 4

The plot for 432MHz, in practise SWR <1,5 on 430-440 MHz! 

The 4-Element-2m-28Ohm-Yagi, Boom 100cm

Gain 7,5dBd, F/B 10dB

3dB-angles: 53,8 hor, 71,0 ver

Vertical stacking distance 2,1m

Boom 16x1mm-aluminium

 

      Position     Lengths (4mm) Lengths (3,2mm)
Reflector 0mm 1019mm 1020mm
Radiator (4mm) 190mm 988mm 989mm
Director 1 545mm 949mm 954mm
Director 2 980mm 944mm 949mm