Construction Details

2-El.-12,5-Ohm (0,40 m)   

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

3-El.-12,5-Ohm (1,90+2,20 m) new

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

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

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

4-El-12,5-Ohm (3,60 +4,00m)

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

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

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

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

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

5-Element-28-Ohm-Yagis with 4.50-m- and 4,80-m-Boom

First Yagi with 4,5-m-Boom, second see down!

Short data: Gain 8.58 dBd, F/B > 25 dB, Great Bandwidth, good pattern

 >1500KHz (49.5-51 MHz) at SWR < 1.5

Link:

A step-by-step description of building this Yagi by Ian, S55O with good pictures

 

The Yagi on the left photo was built by Peter, DK7SP

 

The 5-Ele. by 

Graeme,

VK3GOM

The 5-Ele. built by 

Stefhan,

SM4TZZ

 

The 5-Element- Yagi

 built by 

Sergio,

CT1EWX

 

The 5-Element-Yagi

 built by 

Vel,

9A2VJ

 

Yagi built by Craig, ZS5CID

With that position on the ladder he copied the SV- and 5B4-Beacon at the first test!

The Radiator-Box

in the Yagi of 

Craig, ZS5CID

Element-lengts and positions, for the radiator construction see the 50-MHz-main page! Data updated 18-July-2011

Element

Element-position 

Element-length (12 mm)

Element-length (10 mm)

R

0 mm

2950 mm

2960 mm

DE

615 mm

2900 mm (16+12 mm)

2900 mm (16+12 mm)

D1

1310 mm

2730 mm

2740 mm

D2

2960 mm

2680 mm

2690 mm

D3

4480 mm

2630 mm

2640 mm

Match with 2xLambda/4 75-Ohm-coax in parallel to a grounded socket, feedpoint impedance 50Ohm.

This antenna was designed for mounting 1,50-1,80 m above a shortwave-beam without detuning, this yagi has a great bandwith and is uncritical in the data.

5-Element- 28-Ohm-Yagis with 4.80-m-boom (Version 2)

Very broadband version for mounting 1,5 m above a shortwave beam

Short data: Gain 8,72dBd, F/B 24dB, bandwidth > 1,4 MHz at SWR < 1.5

Element-lengts and positions, for the radiator construction see the 50-MHz-main page! Data updated 18-July-2011

Element

Element-position (mm)

Element-length (12 mm)

R

0

2980

DE

880

2892

D1

1740

2740

D2

3350

2710

D3

4800

2620

Match with 2xLambda/4 75-Ohm-coax in parallel to a grounded socket, feedpoint impedance 50Ohm.