160 meters
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| Feb 6th 2016, 21:24 | |
SIZE358Total Topics: 0 Total Posts: 0 |
Does anyone have info on a 2 wavelength long Loop skywire for 160 meters or would be just a waste of wire ?? |
| Feb 7th 2016, 02:54 | |
gw0nvnTotal Topics: 0 Total Posts: 0 |
Hi, I'm assuming by 'skywire' you mean a horizontal loop. The thing to think about is the height of the horizontal Loop above the ground. At 1/4 wavelength (20m 67ft ), or less above the ground much of the radiation will NVIS. Good for local contacts ( few 100 Km/miles ) It will need to be at least 1/2 wavelength (40m 132 Ft ) for DX contacts. At such a low height there will be losses both due to the wire resistance and ground losses. Just to check, I Googled 2 wavelength Loops and was directed to eham.net. where some amateurs who have built 2 or more wavelength loops for 160m told of their own experiences. I use a 40m loop at 12m ( more than a 1/4wavelength) and get good reports for local signals on 40m. When I used an inverted L of 33m (103ft) I get much better DX reports but not so good local. If you can, try computer modelling the antenna. It should give you some ideas. Also have a look at www.n1su.com best 73's GW0NVN/N1XIH |
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