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-El.-28-Ohm-Yagi (1,50m-Boom), broadband

1,50m-Boom       8,3dBd  Gain       F/R >20dB      SWR<1,2 at 144-146MHz

Stacking distance 2,05m

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.

Elementpositions and Elementlengths, Radiator always 10mm diameter! 

Diameter Ref Rad (10mm) Dir 1 Dir 2 Dir 3
8mm 1022mm 980mm 942mm 930mm 900mm
6mm 1024mm 980mm 948mm 937mm 907mm
4mm 1026mm 980mm 956mm 945mm 917mm
Position 0mm 315mm 545mm 1020mm 1480mm