Bevarage antennas
- some pratical views
Easy beverage antenna:
use fences, street gutters, plain ground
(Chris Knight)
Easier yet: just reel it out (Werner Funkenhauser)
Works great on the ground (Brian Webb)
No moose problems - just mouse... (Werner Funkenhauser)
Scooters don't mix well with wire... (Hermod Pedersen)
Nor do snakes (Dave)
Beverage antennas effective on entire HF range (Frank
Donovan)
Phased multiple beverage antennas more effective (W8JI,
Tom)
Subject:
Easy beverage antenna
From: Chris Knight (cgknight@ix.netcom.com)
Date: August 7, 1995
Original source: Usenet's rec.radio.shortwave
Since
many of us don't have the acreage for beverage antennas, a
"mini-DXpedition" is a "must". However, the beverage antennas
do not need to be elaborate and they don't need to be used only
on mediumwave! They can be used on shortwave as well - especially
for reception on frequencies below about 7MHz.
What I did was go down to a local electronics store and buy 500
feet of 18 gauge, copper, stranded, insulated, speaker wire (speaker
wire has 2 wires side by side). Then, I separated the 2 wires
carefully making sure not to damage the insulation on either one,
and splicing them together end to end, had one 1000 foot piece
of wire! Note: use stranded not solid wire for the
antenna as solid wire tends to break more easily.
Next,
at my parent's house (they have enough room for 750 feet of
the wire), the wire was unrolled on the ground! That is correct!
A beverage antenna with insulated wire does not have to be in
the air to perform as I will show in a little while. But, being
in the air a foot or two helps null stations off the sides a bit
better.
After a month with this Southwest facing beverage on the ground,
I managed to log every station in Tucson and Phoenix including
their 10 watt Traveler's Information stations on 530 and 1610
respectively. I also logged some Australian and New Zealand stations,
the best of which was a 2kW 4XO-1206kHz in Dunedin, New Zealand!
Results were a little less impressive off the back of the beverage,
but I still managed to log Norway-1314kHz and 2 "Radio Comercial"
stations from Portugal.
Directivity was very appearant even though the antenna was on
the ground. Hearing 138 stations from Mexico bore that out. Now,
I've had very good results similar to this with my "Street Gutter"
beverages. They are usually smaller, and, you guessed it(!) in
street gutters (preferably not full of water). I don't recommend
this method, however, since cars can come along and park on your
antenna, and, there is a slight chance someone could come along
and trip on your wire. However, you can use your imagination!
If there
is a row of fences behind your house why not try that? The
antenna doesn't have to be 1000 feet to work well. On some of
the higher mediumwave frequencies and tropical band shortwave,
500 feet will do fine. The antenna should be laid out in as straight
a line as possible pointed at the target stations.
If you really want to go "all out" and can find some sloping land,
make your beverage into a "sloping beverage", sloping toward your
target stations. On a DXpedition to Taos, New Mexico with a sloping
beverage, I logged 16 stations from Japan (I have the tapes to
prove it) and my best all time catch on Mediumwave, CJYR in Whitehorse,
Alberta, Canada on 1400kHz. What made this so amazing was that
1400kHz is a local channel cluttered with stations in the US using
1kW. CJYR was using 60 watts! CJYR was S9+40db on my Kenwood R1000
and the ID occurred an hour and a half before local sunset. I
heard of another person who put up a sloping beverage down the
north side of Cheyenne Mountain in Colorado Springs, and logged
610 CKRW in Whitehorse, YT, Canada. I've used the sloping beverage
before on Rabbit Ears Pass near Steamboat Springs, CO with above
average results.
A beverage
on the ground, finally, gives performance on shortwave that
is simply amazing Extremely low noise. Nothing could be quieter!
I was hearing stations on one beverage that I couldn't even detect
on my 60 meter dipole! Loggings from DXers in Sweden, Norway,
and Finland attest to the superior performance of a beverage on
both shortwave and mediumwave.
Subject:
Easy beverage antenna: just reel it out
From: Werner Funkenhauser (werner.funkenhauser@canrem.com)
Date: August 8, 1995
Original source: Usenet's rec.radio.shortwave
I read
Chris Knight's post on Beverage antennas with interest. I've
never considered running a gutter antenna. Good one!
The gist of what you write, "keep it simple", is true. During
the Spring Newfoundland DXpedition, we strung our antennas as
straight as possible, without much regard for height on stretches
that ran along the ocean shore. One inland antenna had to be hung
as high as possible and we poked the wire up into the branches
of scrub bush 7-12 feet because we had a moose problem. On two
occasions, the critters walked off with our wire.
When I
DX at my cottage, I often pull 1000 feet or more of antenna.
I simply reel it out, allowing it to hang on convenient scrub
and tree branches, even the odd weed. If it falls to the earth,
it's no big deal. In one direction, I have to cross a lengthy
stretch of open rocky shore, with little to support the wire.
I'll just lay it on the ground, stretching it as far as I can
until I hit the water.
Sometimes I use insulated wire attached to floating/anchored empty
bleach bottles to run the wire right over/in the water for more
length on that stretch. My boating neigbours have learned to give
my beach area a wide berth at night, when they see my winking
lights (little led flashers waterproofed and mounted atop the
bleach containers) floating every 100 feet.
Subject:
Beverage antennas works great on ground
From: Brian Webb (brian.webb@arbbs.simivalley.ca.us)
Date: May 16, 1994
Original source: Usenet's rec.radio.shortwave
In November
of 1986 I accidentally discovered that a 1000 foot end-fed
wire works just as well as an antenna if it's laid on the ground
as it does if it's elevated. From late 1986 to early 1988, I deployed
several unelevated, end-fed, very long wire antennas and tested
their performance. The antennas were insulated wires 1000, 1050,
1200, 2000, and 5000 feet long. They were laid on the ground in
a straight line and a communications receiver was connected to
one end.
These antennas exhibited the following characteristics: *
Good sensitivity from 50 KHz to at least 10 MHz (very high
sensitivity from 200 KHz to 3 MHz)
* Directional from 50 KHz to at least 10 MHz (very directional
from 200 KHz to 3 MHz)
* Distant signals heard on the 5000 foot long wire had
virtually no fading
The operating
range of the antennas varied with the environment in which
they were used. When deployed in the Mojave Desert, which has
very dry soilnd a deep water table, the operating range was 50
KHz to at least 10 MHz; wires placed on beach sand only 2 or 3
feet above the salt water table only worked across a 50 to 500
KHz range.
When two or more very long wires are laid out and spaced 30 to
90 degrees in azimuth, different stations are heard on each wire
and with 4 wires spaced 45 degrees, it's possible to do direction
finding (that's how directional these antennas are).
Subject:
No moose problems - just mouse...
From: Werner Funkenhauser (werner.funkenhauser@canrem.com)
Date: October 10, 1995
Original source: Usenet's rec.radio.shortwave
Chris Knight
(cgknight@ix.netcom.com) wrote:
With the "On-The-Ground" Beverage antenna there's no moose
problem here, but rather a mouse problem. Every now
and then a mouse will eat at the wires.
Porcupines
are also pests. They love the vinyl coating.
Have you
ever "put up" a beverage on just the water only? Am curious.
No, but
I did once stretch a 2000 footer directly upon the ice of
Georgian Bay (on which my cottage is located) some years ago,
during late January. The ice was thick after a long cold period
that year. I set up in a tent on shore. For a while it was OK,
but my tent heater couldn't keep up with the temperatures as it
got dark. I quickly retreated to the cottage. Warmer, I was content
enough to DX with a loop!
Subject:
Scooters don't mix well with wire...
From: Hermod Pedersen (hermod@sds.se)
Date: October 12, 1995
Original source: Usenet's rec.radio.shortwave
Swedes
DXing above the Polar circle have occasionally put out long
stretches of wire on, and below, the snow. This is often necessary
when wishing to use/cross huge lakes. One problem is all those
scooter drivers. They do not mix well with copper wire...
Subject:
Neither do snakes...
From: Dave, in Australia
Date: October 12, 1995
Original source: Usenet's rec.radio.shortwave
Interesting
that the beverages actually work below the snow & lakes...
Out here in Australia we have problems with Kangaroos & other
wildlife eating through the wire.. On a recent trip to Cape Otway
(Western Victoria) we found our 2000m bev in about 20 pieces the
following morning.. I would have thought there were more tastier
things than beverages to chew on
I don't know which would be worse.. putting a beverage out in
freezing cold conditions like snow... or as we did last October,
put our antenna out in snake infested territory in 38C.. We had
knee high rubber boots & a shovel for the entire 1500m (This
was at 'The Coorong' in South Australia..)
4 Tiger & Brown snakes had headache's that day & I was
faster than Carl Lewis.. hi!
We actually heard RSI on 1179.. Not a bad feat from here.
Subject:
Beverage antennas effective on entire HF range
From: Frank Donovan (donovanf@jekyll.sgate.com)
Date: October 22, 1995
Original source: Usenet's rec.radio.shortwave
Properly
designed Beverage receiving antennas are very effective across
the entire HF frequency range.
At the W3LPL DX contest station we use Beverages from 1.8 to 14
MHz, and during the sunspot maximum we used them up to 28 MHz!
Beverage arrays (multiple Beverages designed to operate as a phased
array) are even more effective on HF. I've seen Beverage arrays
with as many as 128 individual Beverage elements, each 220 feet
long and 4 feet high.
Subject:
Phased multiple beverage antennas more effective
From: W8JI, Tom (w8jitom@aol.com)
Date: October 23, 1995
Original source: Usenet's rec.radio.shortwave
Frank Donovan
wrote:
Properly designed Beverage receiving antennas are very effective
across the entire HF frequency range.
Mine also
work fine from below the BCB to 30 MHz. I use mine for general
operating on HF.
Beverage
arrays (multiple Beverages designed to operate as a phased array)
are even more effective on HF.
Interesting
to hear that. I've never heard anyone else mention that before.
I've used pairs of 1 wl Beverages spaced broadside 5/8 wl on 160,
and it helps much more than making them longer (actually I never
could tell *any* difference as they were made longer).
But my Beverages, both in Ohio and here in Georgia, still have
poor directivity and S/N ratio for the space they require. HF
receive antennas exclusively rely on directivity to improve S/N
ratio, and all longwire arrays are poor performers in directivity
and power gain vs. physical size.
My small
loop array's with four 15 foot loops spaced 70 feet occupies
around 220 feet of linear space and handily beats the Beverages
on 160 and 80. The normal difference is an "S" unit or so, but
sometimes the loops are superior by several "S" units (especially
when noise or QRM is from the backfire direction).
On the plus side, Beverages and other longwires are much easier
to install.
|