Does anyone know anything about this type of antenae??

Thanks.

candy rosa wrote:

Does anyone know anything about this type of antenae??

Thanks.


Starting point he http://en.wikipedia.org/wiki/Beverage_antenna

--
Eric F. Richards

"Nature abhors a vacuum tube." -- Myron Glass,
often attributed to J. R. Pierce, Bell Labs, c. 1940

In article
,
candy rosa wrote:

Does anyone know anything about this type of antenae??

There have been many arguments about this antenna over the years in this
news group but todays consensus is that beer cans work best.

But seriously this antenna needs a lot of room as it is supposed to be 1
wavelength or longer. It generally should be less then 10 foot off the
ground and the height depends on the frequency of operation and the soil
conductivity. It can be unidirectional or bidirectional off the ends or
the wire depending on whether you terminate the far end. To get a good
match to coax and also protect your radio from static buildup from the
very long wire you need to use an appropriate transformer.

You should be able to search Google for info on this antenna. If you
don't know the soil conductivity number you can just go with 5 or 6 foot
off the ground.

This antenna receives common mode so if the area you live in is fairly
quiet or better it could be a good choice.

--
Telamon
Ventura, California

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.

BQuick 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.

On Dec 24, 5:27*pm, Telamon
wrote:
In article
,
*candy rosa wrote:

Does anyone know anything about this type of antenae??

There have been many arguments about this antenna over the years in this
news group but todays consensus is that beer cans work best.

But seriously this antenna needs a lot of room as it is supposed to be 1
wavelength or longer. It generally should be less then 10 foot off the
ground and the height depends on the frequency of operation and the soil
conductivity. It can be unidirectional or bidirectional off the ends or
the wire depending on whether you terminate the far end. To get a good
match to coax and also protect your radio from static buildup from the
very long wire you need to use an appropriate transformer.

You should be able to search Google for info on this antenna. If you
don't know the soil conductivity number you can just go with 5 or 6 foot
off the ground.

This antenna receives common mode so if the area you live in is fairly
quiet or better it could be a good choice.

--
Telamon
Ventura, California

OK. Thanks. How does one find soil conduuctivity exactly. ?? Is
there a site to go to for that information.??

In article
,
candy rosa wrote:

On Dec 24, 5:27*pm, Telamon
wrote:
In article
,
*candy rosa wrote:

Does anyone know anything about this type of antenae??

There have been many arguments about this antenna over the years in this
news group but todays consensus is that beer cans work best.

But seriously this antenna needs a lot of room as it is supposed to be 1
wavelength or longer. It generally should be less then 10 foot off the
ground and the height depends on the frequency of operation and the soil
conductivity. It can be unidirectional or bidirectional off the ends or
the wire depending on whether you terminate the far end. To get a good
match to coax and also protect your radio from static buildup from the
very long wire you need to use an appropriate transformer.

You should be able to search Google for info on this antenna. If you
don't know the soil conductivity number you can just go with 5 or 6 foot
off the ground.

This antenna receives common mode so if the area you live in is fairly
quiet or better it could be a good choice.


OK. Thanks. How does one find soil conduuctivity exactly. ?? Is
there a site to go to for that information.??

Here is an FCC link to ground conductivity.
http://www.fcc.gov/mb/audio/m3/

On this page down a little bit is a big map you can download along with
other informational options.

--
Telamon
Ventura, California