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

4-Element-20-m-Yagi with 28 Ohm

Boom 7,60m   Gain 6,3 dBd

Updated data for better F/B and greater bandwidth 03/2013

The Yagi built by Syed, AP2AM (above a 3-El.-28-Ohm-Yagi for 15 m)

 Elements of the 4-El.-20m-28-Ohm-Yagi, lengths for one element-half: 

 

30x2 mm

25x2 mm

20x1,5 mm

16x1 mm

Length

Position

Ref

-

1000 m

2000 mm

2375 mm

5375 mm 0 mm

Rad

500 mm

2000 mm

2000 mm

760 mm

5260 mm 1830 mm

Dir 1

-

1000 mm

2000 mm

2060 mm

5050 mm 3410 mm

Dir 2

-

1000 mm

2000 mm

1735 mm

4735 mm 7685 mm

  Azimuth-diagram (horizontal pattern):