Construction Details

2-El.-12,5-Ohm (0,40m)   

2-El.-28-Ohm (0,60m)

3-El.-12,5-Ohm (1,90m)

3-El.-28-Ohm (1,90m)

3-El.-28-Ohm (2,50m)

4-El-12,5-Ohm (2,90m)

4-El-12,5-Ohm (3,60m)

5-El.-28-Ohm (4,50m)

5-El-12,5-Ohm (6,00m)

5-El-18-Ohm (6,00m)

6-El.-28-Ohm (7,20m)

7-El.-28+50Ohm (9,20+7,75m) 8-El.-28-Ohm (12,30m) 9-El.-28-Ohm (14,00m)
4-El-28-Ohm (2,20m) 5-El-50-Ohm (4,30m) new 6-El-50-Ohm (6m+7,20m) new

5-Element-50-Ohm-Yagis with 4-m- and 4,30-m-Boom

The Yagi with 4-m-Boom see down!

These antennas are scaled types of built and well tested 2-m-Yagis

Boom 4,30 m

Medium Bandwidth, High-Gain-Design

8,5dBd (10,65dBi)

F/B 24dB

Elements fixed 12mm or 10mm, Radiator 12/16mm, tunable (see picture)

Feeding with a 50-Ohm-coax-choke (about 1,20m cable)

Element El.-Position El.-Length (12 mm) El.-Length (10 mm)
Ref 0 mm 2974 mm 2978 mm
Rad 800 mm 2896 mm 2896 mm
D 1 1210 mm 2727 mm 2734 mm
D 2 2735 mm 2696 mm 2706 mm
D 3 4260 mm 2660 mm 2670 mm

5-Element-50-Ohm-Yagi with 4-m-Boom

Boom 4,00 m

Medium Bandwidth, High-Gain-Design

8,27 dBd (10,65 dBi)

F/B > 25dB

Element lengths and positions, radiator with 16-/12-mm-tubes as described above

Element El.-Position El.-Length (12 mm) El.-Length (10 mm)
Ref 0 mm 2966 mm 2972 mm
Rad 835 mm 2970mm 2968 mm
D 1 1225 mm 2784 mm 2792 mm
D 2 2560 mm 2744 mm 2754 mm
D 3 3970 mm 2674 mm 2686 mm