Jim,
It stops acting like a Beverage, because it has much capacity to ground
over its entire length, it acts like a tuned circuit. It becomes more
directive as modeling shows.
Please see IV3PRK at HC1PF research, its best to see modeling page first
http://www.iv3prk.it/bog-modeling.htm
Then the research page
http://www.iv3prk.it/new-page.htm
As Guy, K2AV said earlier, we need to change the name to reflect
its characteristics.
wig =wire in ground, wug wire under ground, wog =wire on ground,
' Its open for all sugestions'. One should take ! (; > ))
Name wise, this is an antenna in the making. hi
-----------
Guy,
(My WD1-A two wire, two direction "BOG" antenna)
I do not have the exact measurement, but it is now about 175/177 feet .
It has rained almost daily here. Many bugs,& ticks are out, There are
two types of black flies in large swams that are fast to attack.
Soon I will get my courage up, and after suitable clothing protection,
will get the exact measurement through the weeds/vegetation, and post
it..
73
Bruce-k1fz
On Fri, 6 May 2016 15:37:59 -0400, James Wolf wrote:
Bruce,
This is interesting, it seems up until now, I was under the impression
that once a beverage was at or below ground, it lost directivity.
Thanks,
Jim - KR9U
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of K1FZ-Bruce
Sent: Thursday, May 05, 2016 11:34 AM
To: Topband
Subject: Topband: 2 wire BOG antenna update
After the spring frost out, noticed my best front to back was at the
top of the BCB (broadcast band). The change this year was less than
previous years.
The BOG wire is now out of sight, buried under vegetation and earth.
Listened while scanning frequencies to a 'distant thunder shower'
headed this way, to find the best front to back.
Took off about 6 feet of BOG wire and best F/B now is up to about 1810 KHZ.
What is noted; As the BOG wire is under more vegetation, and earth
moisture, it becomes more stable. 160 meter signals have more earth
penetration than higher frequency bands.
If I had to do an installation again, would 'shallow bury' the wire.
Tucking the wire just under the earth.
Like most transceivers, my bar graph S meter is probably not well
calibrated. But can see 'up to' 8 S points front to back low in the 160
meter band.
73
Bruce-K1FZ
http://www.qsl.net/k1fz/bogantennanotes/index.html
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|