Home > HF, Home Brew > 80m Vertical Loop up again after Cyclone Yasi

80m Vertical Loop up again after Cyclone Yasi

Cyclone Yasi tore down my big 80m vertical loop, but I’ve got it back up again and set up a little better.

The configuration is a triangle with apex in the top of a very tall tree. The antenna is fed at a bottom corner using 450 ohm ladder line. The 450 ohm line runs across the garden from the 4:1 balun external to the house. Coax then runs inside the roof of the house to the rig.

The height and configuration is slightly different to previous, so I modelled it again in CocoaNEC.

I’ll present the modelling at the design frequency first, then on the other bands in another post.

80m elevation plot

Got to love 10.0 dBi at 20 degrees elevation in the plane of the antenna, so that is NW, SE. Good for SE Asia, Mediterranean, Europe, New Zealand, parts of South America. Not so good for North America unfortunately.

Categories: HF, Home Brew
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  1. January 26, 2012 at 11:35 am

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