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-Ohm (1,50m)  5-Ele.-28-Ohm (1,80m) 5-Ele.-28-Ohm (2,00m) 6-El.-28-Ohm (2,40m)
6-El.-28-Ohm (2,60m) 7-Ele.-28-Ohm (3,00m) 7-Ele.-28-Ohm (3,30m) 8-Ele.-28-Ohm (4,35m)

5-Element-Yagi for the 2m-Band with the 28-Ohm-DK7ZB-Match

Boom 2m, Gain 9dBd, F/B > 20dB

 

Stacking distances

2,40m vertical

 2,35m horizontal

4x5-Element stacked at DL0BL

Contestcrew DL0BL  

Link with more pictures/infos

 

Antennas in H-configuration, built by Piotr, SP9TTG

Elementpositions and Elementlengths

Diameter Refl Rad (10mm) Dir 1 Dir 2 Dir 3
Position 0mm 410mm 815mm 1475mm 1970mm
Elements 10mm 1022mm 958mm 911mm 916mm 880mm
Elements 8mm 1024mm 958mm 919mm 922mm 888mm
Elements 6mm 1026mm 958mm 927mm 929mm 897mm
Elements 4mm 1028mm 958mm 937mm 938mm 907mm

Short data for the Yagi at the begin, in the middle part and at the end of the band

Plot with the NEC-II-reference of YO7.2 by K6STI

The meaning of the data :

Frequency, gain, F/R, radiation resistance (impedance), SWR and loss against a theoretical defined maximum- gain-Yagi with the given boomlength. Remember that this gain is only available with very low impedance and extrem low bandwidth!