4 ELEMENTS YAGI


Serious results can be expect when you have a 4 elements Yagi, in most cases all what the Big-guns are working you will be able to hear and work the Dx as well.
With the 4 elements yagi we come on a point when we must pay serious effort to our mast and rotating system. Light 4 element can still be used with light rotators like channel master although their life is reduced with extra bearings this again is length. But better is to put a system on your mast like a G600 or an equivalent and a heavy duty 4 elements with this you will have a long lasting solution and one which is able to make some great DX-results.

 
Boom length 5,68m HPSD 4S
Boom length 6,82m HPSD 4L
Design freq:
27,555 MHz
27,555 MHz
Gain:
7 dBD
8 dBD
F/B:
22 dB
30,2 dB
Beam width:
85,2 degrees
68 degrees
Band width
0,8 MHz
0,7 MHz
Element thickness
22mm
22mm
A=
4570mm
4935mm
B=
5020mm
5080mm
C=
5190mm
5180mm
D=
5460mm
5480mm
E=
2600mm
2490mm
F=
1500mm
2010mm
G=
-1590mm
-2200mm
 


4 element short boom

Above mentioned you can see the schematic diagram (not drawn to scale) and the antenna his radiation pattern in the azimuth plane.

The pattern difference from the one mentioned above:


4 elements long boom