Construction Details

3-El.-10m

4-El-10m

3-El-12m

4-El-12m

3-El.-15m

4-El.-15m

3-El.-17m

4-El.-17m

3-El.-20m

4-El.-20m

5-El-10m

3-Element-10m-Yagi with 28Ohm

Very short boom (3,00m), for 28,0-28,8MHz lightweight construction possible

The stacked array built by Max, DK1MAX. Gain of the group is 8 dBd, stacking distance 5,00 m.

The two plots show the azimuth patterns by EZNEC, they are verified by field-measurements.

Antenna built by Attila, DL1NUX

Report with a lot of pictures      LINK to DL1NUX

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!

 Elements of the10-m-28-Ohm-Yagi, lengths for one element-half: 

 

16x1,5mm

12x1mm

Position

Ref

1,00m

1,705m

0m

Rad

1,00m

1,57m

1,36m

Dir

1,00m

1,40m

3,00m

Azimuth-diagram (horizontal pattern):

Elevation-diagram (vertical pattern):