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-28Ohm-Yagi (1,80m-Boom)

Gain 8,9dBd       F/B 20dBd     Boom 1,80m      Broadband-version

Stacking distance 2,20m

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 YO7.23 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! The red line shows the profile of the element currents.

Elementlengths, Radiator always 10mm diameter! 

Diameter Refl Rad (10mm) Dir 1 Dir 2 Dir 3
Position 0mm 350mm 710mm 1295mm 1780mm
Elements 8mm 1022mm 961mm 926mm 922mm 893mm
Elements 6mm 1024mm 961mm 934mm 929mm 901mm