This is my first post to the Top-Band Reflector, so please excuse my ignorance
if this topic has been discussed in the past.
Is there any scientific data in print to prove the theory that ocean front
property is better than a location inland about a mile or so on a ridge
overlooking salt
The RHR team is also expanding to the State of Maine with multiple Ocean Front
Properties…. more details to follow.
More local QRM from clueless remote operators. Why don't you expand on the west
coast? Can anyone save us
from this plague?
Roger
On 4/1/2015 7:47 AM, HVT wrote:
This is my
Below is a link to the groundwave field of a 1 kW non-directional AM
broadcast station located about 1 mile from the Atlantic, in Florida.
The groundwave field shown is based on the FCC M3 conductivity map, and
their GW propagation charts for this frequency and power.
The space wave fields
To BOG, or not to BOG, that is the question.
Many are aware of the good, and bad points of the antenna.
Good:
Is out of sight.
Requires a small space to function well
Typically has less noise than an above ground Beverage
As disturbed condx (QRN crashes) begin, it can be the quietest antenna.
Hello Bruce,
This is a very interesting subject.
I am about to maybe test a BOG here at my French QTH and I am wondering
if there are any tests made with best terminating resistance (235ohm? )
should I use a 9:1 transformer or 10:1 ?
how does it perform compared to a usuall beverage?
Can I
Hi Felipe,
Suggest you examine this website:
http://n4dj.com/Beverage.html
73
Frank
W3LPL
- Original Message -
From: Filipe Lopes ct1...@gmail.com
To: k1fz k...@myfairpoint.net
Cc: topband topband@contesting.com
Sent: Wednesday, April 1, 2015 3:18:01 PM
Subject: Re: Topband:
Thank you Frank. Will have a look at it.
73's Filipe Lopes
CT1ILT - CR6K
F4VPX - TM3M
2015-04-01 16:55 GMT+02:00 donov...@starpower.net:
Hi Felipe,
Suggest you examine this website:
http://n4dj.com/Beverage.html
73
Frank
W3LPL
--
*From: *Filipe Lopes
Hi Ray,
Two primary factors affect sky wave signal strength from Topband
verticals close to salt water:
1. ground loss in the immediate vicinity of the feed point. The feed
point must be much closer than 1/4 wavelength from salt water
or a salt marsh to significantly reduce ground loss.
Rich,
Have a look at 1KW 1130 AM on Hilton Head Island, SC (WHHW-AM). At 12 noon
on any day, I can easily ride that signal down the Space Coast of FL and
about 10 miles inland. That's the entire coast of GA, part of SC and half
of FL.
Paul, W9AC
-Original Message-
From: Richard
I put a BOG down for this winters DX season on 160m and was very
impressed with it, compared to my three 550ft Beverages (NW, NE, S). I did not
have the SW direction covered, so I put up this BOG just after the ARRL 160m
contest as it's need was evident following the difficulty hearing on
I think BOG's are under rated. I worked FT5ZM and XV7BM last January with
bidirectional BOG, 550ft long that was under 3 inches of snow that was in the
weeds of southern Utah.
It's all about noise
Hardy N7RT
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com]
Now-a-days I'm just 90% an appliance
operator; lack of EE knowledge other than
reading all the handbooks back in the late
70's give me today that puts me at a
disadvantage when it comes to salient salt
water detail...
I'm on a salt marsh, running QRP I hear
599 from people I'm in a QSO
If anyone is serious about trying a BOG, I would spend the time searching
the Topband reflector archives for K2AV's comments about them. Although I
can't personally vouch for the accuracy of Guy's thoughts concerning BOG
length and soil conditions (measured with a DOG*), I am 99.9% convinced
that
BOG antenna notes may be of some help:
www.qsl.net/k1fz/bogantennanotes/index.html
73
Bruce-k1fz
- Original Message -
From: Jeff Wilson jjw5...@yahoo.ca
To: topband@contesting.com
Sent: Wednesday, April 01, 2015 8:19 PM
Subject: Re: Topband: BOG antennas
I put a BOG down
Please see the articles on sea gain (from technical reports of the
BBC Engineering Department), referenced by Chuck Hutton, which I
believe addresses this very phenomenon.
73,
Nick
At 17:13 01-04-15, you wrote:
As I recall, the vertical signal strength to low angle DX went up
Have a look at 1KW 1130 AM on Hilton Head Island, SC (WHHW-AM). At 12 noon
on any day, I can easily ride that signal down the Space
Coast of FL and about 10 miles inland. That's the entire coast of GA,
part of SC and half of FL.
That's pretty much as shown for them (link below). Nice signal
Some may wonder why I posted the groundwave coverage contour of an AM
broadcast station as being relevant to this thread. Hams are mostly
interested in the space wave radiated by an antenna system.
The NEC4.2 plots linked below show how the space wave and ground wave fields
launched by a
In 1997 I moved from a home about 1/2 mile from the ocean to oceanfront
property (I live on an inlet). I put up a hytower with a 160 wire
(inverted L). This was the same antenna I had inland that I was
struggling with. I just could NOT believe the difference. Instead of
fighting pileups
In my 40 years of DXing I have encountered my share of clueless operators,
even on Topband. I am reasonably certain most of them were not operating
remotely. The recent decision by the ARRL should have laid to rest the
question of remote operations and DXCC. I would respectfully suggest to
Roger
Hi Paul,
Its the perfect location for a Topband 4-square array!
It would be even better if the array were in the marsh...
Marshland Road,
Hilton Head Island
Hi Frank,
Thank you for your detailed answer. I appreciate your valuable time in
responding.
After a few emails and a phone call it looks like we need to be within the
fresnel zone, which is five wavelengths according to the ON4UN book.
Yes! I know Peter K3ZM location all too well. We put up
You might want to take a look at some technical reports from the BBC
Engineering Department. Two in particular: RA-25 titled Influence of Ground
and Sea on MF Propagation and 1975-32 titled LF and MF propagation : An
Approximate Formula for Estimating Sea Gain.
Both (and many more very
Steve, you might want to go back and re--read the minutes of the January
Board meeting. The issue of remotes and DXCC was referred to the Programs
Services Committee for further review. It has not been laid to rest.
Larry K5RK
-Original Message-
From: Topband
Hi Ray,
If you're back five wavelengths from salt water or salt marsh, almost the
entire Fresnel zone will be over land and the salt water will make essentially
no improvement . That's okay if the land is salt marsh, but its very bad if
it poor sandy soil... For a take off angle of ten
Hi Ray,
If you're back five wavelengths from salt water or salt marsh, almost the
entire Fresnel zone will be over land and the salt water will make essentially
no improvement. That's okay if the land is salt marsh, but its very bad if
it poor sandy soil... For a take off angle of ten
If you're back five wavelengths from salt water or salt marsh, almost the
entire Fresnel zone will be over land and the salt water will make
essentially
no improvement . That's okay if the land is salt marsh, but its very bad
if
it poor sandy soil... For a take off angle of ten degrees, the
Don's email nicely describes the lack of salt water advantage when you're
just 2500 feet from the ocean or salt marsh.
Perhaps Don can describe the soil characteristics at his site 1/2 mile from
the ocean and at his newer ocean front QTH. I suspect his old QTH had
poor sandy soil and his
My QTH is about 6 miles inland and 500 MSL from the head of the Penobscot
Bay. I get great propagation to the East and South. IMHO unless you need to
get radials within a critical distance of Salt Water I would opt for
something a few miles inland and on a ridge.
More importantly, have you done
The best write up and data I have seen on this subject was the team
vertical report on test done in Jamaica back about 10 or more years ago.
As I recall, the vertical signal strength to low angle DX went up
dramatically within 2 or less wavelengths of the edge of the high water
mark and maybe
Frank:
Correct, the old house's soil was sandy on top of clay. The salt marsh
has soil that is your usual black muck and is ALWAYS wet. During extreme
high tides the bottom of the element actually goes below the water
line. Luckily that hasn't happened often or when I need to be qrv.
Tom,
Received a lot of valuable information from very smart people today that know a
lot more about this stuff than I. We can move forward with an intelligent game
plan to add a well equipped station for contesting on the coast of Maine. Hope
to break ground sooner than later, keep you posted
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