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| Antenna
shown rolled up and attached to optional FDMK mounting kit |
The antenna for EOC's - ALE and NVIS!
Barker & Williamson's
BWDS series of broadband
folded dipole antennas, together with our
MK114 mast systems, gives rear tactical and
base units the full HF communications capability they need. These antennas are so unique
that they were even patented! A wide variety of missions can be handled
with this one antenna, from long range base stations to NVIS in the field. They offer fully automatic, low SWR operation
over the entire HF band without need for an antenna tuner/coupler, as
well as coverage from 30 to 60 Mhz with a tuner for your newest radios.
They are
frequency agile, and will operate continuous ALE. They
will propagate excellent NVIS, medium or long distance.
Besides impressive performance
transmitting, this antenna design also delivers when it comes to
reception. The superior signal to noise ratio, loop configuration,
and a high impedance terminator allows reading the weakest signals that other
antennas would lose in the background noise. You even get automatic static bleed off from wind or thunderstorms.
There are no mechanical parts
like relays or motors to wear out, as in some other broadband tuning
systems! Ready
to go right out of the box, no taps to change, no measuring, nothing to tune.
Designed for the military, built to last, priced for anybody's budget.
Fast and simple to deploy.
It's Simple . . . It's Reliable . . .
It Works!
Why utilize a broadband
antenna?
- Frequency Agile
|
- The new standard for military, government,
homeland defense. Hop frequencies at any speed as long as you want,
as there are no mechanical parts or active components to wear
out. ALE radios allow reliable HF communications in any weather,
day or night, without an experienced operator.
|
| Military/Govt |
This one antenna performs short, medium,
and long haul, NVIS, and ALE. Whatever the mission, this antenna will
perform. |
| Emergency
Management |
Covers all of your special emergency
frequencies including FEMA,
present and future. |
| Commercial |
Marine or land based. No matter
which frequencies you get assigned, no problem. |
| MARS,
ARES, RACES, CAP, Amateur |
This one antenna does all of your
"out of band" frequencies! If your frequencies change it
isn't a problem. For regular amateurs, it is a single antenna
solution. |
- Cost
|
- Low cost. Utilize one antenna instead of
several. No need for an antenna coupler/tuner. No antenna switches.
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- Performance
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- Not limited to conventional ham bands. Tune any
frequency in the antenna's bandwidth, and have VSWR of 2:1 or better
in HF. VSWR of 3:1 or better from 30 - 60 Mhz. Capture weak signals in receive mode. Much better performance
than any vertical. Very reliable.
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- Simple to Install
|
- Easy to install as inverted Vee, flat top, or
sloper. Just put it up! No adjustments of any kind. No tuning.
Completely assembled. No grounds to play with. Mounting kits available.
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- Simple to Use
|
- Commercial, military, and disaster relief
operations may utilize personnel with far less training. No more
choosing which antenna to use, no endless playing with a tuner.
|
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This antenna was designed at Barker & Williamson
by the request of the United States Government more than 25 years ago.
Since then we have supplied tens of thousands of them to the U.S.
Armed Forces and many other military organizations including NATO,
UN, international disaster relief organizations, emergency
management operations, and countless commercial organizations around the
world. It is also a favorite among amateur
operators. They can be found on every continent in the world,
including Antarctica. From the desert, to tropical rain forests, to
frozen tundra - we know that they are pretty tough and deserve their
excellent reputation for performance worldwide. |
Usage Tips:
Always use the longest antenna that will fit your
space, as it will have better radiation efficiency at the low frequencies and
give you a stronger signal.
Properly mounted these antennas will
withstand hurricanes, making them an ideal choice for emergency services and
mission critical installations. The stainless steel wire is able to self
support the antenna between two end mounts. However, in high wind areas use of a three pole
mounting is highly recommended. This will hold the center components
securely, and extend life. Note that the 180 ft antenna must have an FDMK center support.
For medium or long range communication, recommended minimum
clear apex height is 25 feet for 80 meter, 40
feet for 160 meters. The higher the installation, the more effectively the
antenna will radiate, especially at the lower frequencies.
NVIS
propagation is performed as a flat-top from ground level to approx 12 feet high,
depending upon frequency, ground conditions and distance of coverage desired.
Choose the correct model for your needs
- Model
|
- Length
|
SWR
<2:1 |
SWR
<3:1 |
Material |
- BWDS-20N
|
- 20 Ft
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- 14 - 30 Mhz
|
- 30 - 60 Mhz
|
- Stainless steel
|
- BWDS-45N
|
- 45 Ft
|
- 7 - 30 Mhz
|
- 30 - 60 Mhz
|
- Stainless steel
|
- BWDS-65N
|
- 65 Ft
|
- 4 - 30 Mhz
|
- 30 - 60 Mhz
|
- Stainless steel
|
- BWDS-90N
|
- 90 Ft
|
- 1.8 - 30 Mhz
|
- 30 - 60 Mhz
|
- Stainless steel
|
- BWDS-180N
|
- 180 Ft
|
- 1.8 - 30 Mhz
|
- 30 - 60 Mhz
|
- Stainless steel
|
Common Specifications:
- SWR less than 2:1 over entire HF frequency range for the
model
- SWR less than 3:1 from 30 to 60 Mhz
- Lowest noise for unmatched reception
- No antenna tuner required for HF
- 2 KW PEP Input Power, 1 KW PEP Output Power
SSB/CW ICAS (Intermittent Commercial and Amateur
Service)
- #14 stranded stainless steel
- 50 ohm input with N connector
- Comes completely assembled, easy to install
- Install as inverted Vee, flat top, or sloper
- 90 Ft and shorter antennas may self support
- Three pole mast kits available (MK114)
You must use a three pole installation for the 180 foot
antennas.
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Barker & Williamson - All rights reserved |
