Details 2-El.-2m 3-El.-2m 4-El.-2m 5-El.-2m 6-El.-2m
7-El.-2m 7-El.-70cm 9-El.-70cm 10-El.-70cm 12-El.-70cm 14-El.-70cm
Stacked 5-El-2m 25-Ohm new 7-El.-2m  25+28-Ohm  new 8-El.-2m  28-Ohm new 10-El.-70cm  28-Ohm new

The 5-Element-2-m-Yagis

1.)   1,50-m-Boom, 50 Ohm    2.)   1,40-m-Boom, 50 Ohm     3.)   1,50-m-Boom, 28 Ohm  (new)

Version 1: 5-El.-50-Ohm, 1,50 m Boom

Boom 1,5 m, 20mm PVC tubing

 Gain 8,48dBd, F/B 24dB, very good pattern

3dB-angles:   51,2 hor, 64,6 ver

For vertical stacking distance 2,10 m

 

Left: Antenna built by Olli, DH8BQA

For a further reducing of the weight the directors can be made of 2,4 or 3,2mm rods, 4mm is possible, of cause.

If you want to built the Yagi with 6mm-elements and conventional boom, I have listed the dimensions in the table, too.

 

The 5-El.-Beam is available in a commercial version (picture right) at

http://www.sotabeams.co.uk

 

New design (Nov. 2008) for better pattern:

  Position Lengths 2,4mm Lengths 3,2mm Lengths 4mm Lengths 6mm
Reflector 0mm 1038mm 1037mm  1036mm 1034mm
Radiator 280mm 995mm (4mm) 995mm (4mm) 995mm (4mm) 988mm (6mm)
Director 1 430mm 959mm 954mm  949mm 939mm
Director 2 950mm 949mm 944mm 939mm 929mm
Director 3 1480mm 935mm 929mm 923mm 912mm

Version 2: The 5-Element-2-m-Yagi, 50 Ohm, Boom 140 cm

Fits in a 1,45-m-fishing-bag for transport

 

Gain 8,23 dBd, F/B 30 dB, very good pattern

3dB-angles:   51,0 hor, 64,8 ver

For vertical stacking distance 2,10 m

The Yagi built by

Emmanuel, LU5HED

Lengths and Positions of the Elements

  Position Lengths 2,4 mm Lengths 3,2 mm Lengths 4 mm Lengths 6 mm Lengths 8 mm
Reflector 0mm 1034 mm 1032 mm  1031 mm 1028 mm 1024 mm
Radiator 290 mm 1021 mm (4 mm) 1021 mm (4 mm) 1018 mm (4 mm) 1014 mm 1014 mm
Director 1 425 mm 977 mm 973 mm  968 mm 960 mm 954 mm
Director 2 890 mm 964 mm 959 mm 954 mm 945 mm 938 mm
Director 3 1380 mm 942 mm 936 mm 930 mm 920 mm 911 mm

Version 3: 5-El.-28-Ohm, 1,50 m Boom (new)

 Extreme broadband design, SWR 144-146 < 1,1

Gain 8,35 dBd, F/B 28 dB, very good pattern

3dB-angles:   50,8 hor, 64,2 ver

For vertical stacking distance 2,15 m

Lengths and Positions of the Elements

  Position Lengths 2,4 mm Lengths 3,2 mm Lengths 4 mm Lengths 6 mm Lengths 8 mm
Reflector 0mm 1034 mm 1032 mm  1030 mm 1028 mm 1026 mm
Radiator 315 mm 997 mm (4 mm) 997 mm (4 mm) 997 mm (4 mm) 992 mm 987 mm
Director 1 545 mm 969 mm 965 mm  962 mm 952 mm 945 mm
Director 2 1025 mm 959 mm 954 mm 951 mm 940 mm 933 mm
Director 3 1485 mm 935 mm 929 mm 926 mm 911 mm 903 mm