Details for all Yagis 1-El.-50Ohm 2-El.-28Ohm 3-El.-28+50Ohm
4-El.-50Ohm (0,76m) 4-El.-28Ohm (0,76m) 4-El.-28Ohm (0,82m) 4-Ele.-28-Ohm (1,00m)
5-Ele.-28+50Ohm (1,50m)  5-Ele.-28-Ohm (1,80m) 5-(6)-Ele.-28-(50)-Ohm (2,00m) 6-El.-28-Ohm (2,40m)
6-El.-28-Ohm (2,60m) 7-Ele.-28+50Ohm (3,00m) 7-Ele.-28-Ohm (3,30m) 8-Ele.-28-Ohm (4,35m)

1-Element-50Ohm-"Yagi"

Gain 2,65dBd, F/B 5,5dB

Dipole mounted about 250mm in front of the support (check distance for SWR=1,0)

Match with the DK7ZB-choke

If the dipole is mounted vertically 250mm in front of a metal support as shown in the picture , the gain is 2,65dBd at 5,5dB F/B. First correct the length of the radiator for best SWR, then change the distance to the support, if SWR not <1,2

  144MHz 145MHz 146MHz
Impedance 49- j5 Ohm 50 +/-  j0 Ohm 51,5 + j5 Ohm
SWR 1,1 1,0 1,1

Length of the dipole (tip to tip):

Diameter

4mm

6mm

8mm

10mm

Length

958mm

950mm

943mm

939mm

 Patterns for vertical mounting: