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December 26th 07, 03:11 AM
posted to rec.radio.shortwave
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Beverage Antenae
On Dec 23, 9:34*pm, wrote:
candy rosa wrote: Does anyone know anything about this type of antenae?? Thanks. A  do a Google search.B Quick an dirty explanation and comments.The Beverage is a variation on the true 'long wire' antenna. One end is terminated and the terminated end is pointed in the direction of gain. It must be at least 2 wavelengths and 4 WL is better. It tends to be most useful up to maybe 5MHz. Most hams say 3.5 is the typical upper limit. During a sunspot maximum several decades ago, they were used as high as 10M or 28MHz. At 100KHz is 3000M. At 1000KHz or 1MHz a wavelength is 300M. 3.5MHz a wavelength is about 80M. Beverage antennas are somewhat dependent on ground characteristics. The interaction between the conductor the soil tilts the incoming EM wave front and this is what gives it gain. Matching to a feed line can be 'twitchy'. The method the conductor is brought to the matching transformer can make or break a Beverage. If you want, but are too lazy to dig it up, I have a link somewhere to the patent issued to Dr. Beverage that I will post. The skinny is that for most of us a Beverage is not the best option. I don't know about you, but I don't have 600M of land available. This antenna is of historic interest and has a pretty narrow utility today. Some high end BCB/MW DXers love them and take trips to exotic places to erect them. I hope this helps. Terry Exactly what I was looking for. Thanks. |
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