Re: [IRCA] Computer Model of Bog

["Bob Young" <youngbob53@xxxxxxx>]

Pardon my ignorance but what exactly does BOG stand for? Beverage on Ground? 
These sound pretty good if so, I can't really dig around here too much junk 
in the woods but could lie two wires on the ground if that's what these are, 
how exactly do you construct these? How would they compare to two 400' LW's 
30-50 ft up in the air?

Bob Young
Milllbury, Ma


>From: "Neil Kazaross" <neilkaz@xxxxxxxxxxxxx>
>Reply-To: Neil Kazaross <neilkaz@xxxxxxxxxxxxx>,        Mailing list for 
>the International Radio Club of America<irca@xxxxxxxxxxxxxxxx>
>To: "Mailing list for the International Radio Club of 
>America"<irca@xxxxxxxxxxxxxxxx>
>Subject: Re: [IRCA] Computer Model of Bog
>Date: Fri, 22 Dec 2006 13:29:59 -0600
>
>Hi, Gil..my appologies for not getting back to you sooner about my
>experiences with BOG's.
>
>I don't find it possible to accurately model a BOG with EZNEC since I don't
>think it properly takes into account the slowing of the velocity of
>propagation when the wire is on the ground. Additionally, I feel that EZNEC
>can be a bit squirrelly with wires directly on the ground.
>
>However, my experience coincides with the theory and tables I've seen and
>that is that a BOG has a pattern like a typical Beverage of constant height
>that is 2.5 times longer. Also since classic Bevs need to slope to ground 
>at
>both ends I feel that there are a bit less extranious side lobes with BOGs.
>An unterminated BOG has a considerably better F/B than does an unterminated
>Bev. I'd expect the back lobe to be down about 5 or 6 dB midband for a 500
>ft BOG.  You may find my detailed test results posted here to be
>interesting.
>http://www.dxing.info/community/viewtopic.php?t=371
>
>Soon after I used my first BOG here, I took down all elevated mini-Bevs and
>for the most part stopped using KAZ antennas (or anything else with a wide
>cardiod pattern) because I have much less signal from the sides off BOGs 
>and
>can phase 2 of them to get great F/B.
>
>A few winters ago, before my property here was torn to shreads in the 
>middle
>due to building our new home, I ran a 317 ft W BOG and a 343 ft WSW BOG out
>my shack's windows. On the regionals and GY's in the upper 3rd of the band,
>I'd often have totally different stations dominating on the respective 
>wires
>and always from near their intended directions. An example was Amarillo on
>1310 with 88 watts being DXable on the WSW and never had on any other
>antenna.
>
>I can play around with longer BOGs up north at my place in WI.  893 feet
>clearly beats 475 feet on the low end as it is more directive. It also has 
>a
>better F/B and thinks like CFRB 1010 come in much better in the day on the
>longer BOG due to better directivity and also better F/B (less WSPT). For
>the top end of the band, anything much above 900 ft is too long if the wire
>is right on the ground since I find that it is too lossy and the pattern
>starts to deteriorate. Even with several hundred feet you'll note lower
>signal levels on stuff up near X-band than with shorter wires, but this is
>OK since directivity is very good.
>
>73 KAZ
>
>----- Original Message -----
>From: "Gil Stacy" <gilstacy@xxxxxxxxx>
>To: "Mailing list for the International Radio Club of America"
><irca@xxxxxxxxxxxxxxxx>
>Sent: Thursday, December 21, 2006 4:54 PM
>Subject: [IRCA] Computer Model of Bog
>
>
> >I would grateful if someone could either provide me by email or direct me
> >to
> > a site that has an Enzec or other computer  simulation of a 500' bog,
> > unterminated,  and over average ground.  Frequency would be anywhere in
> > the
> > MW band.  Thanks.
> >
> > 73, Gil NN4CW
>
>_______________________________________________
>IRCA mailing list
>IRCA@xxxxxxxxxxxxxxxx
>http://montreal.kotalampi.com/mailman/listinfo/irca
>
>Opinions expressed in messages on this mailing list are those of the 
>original contributors and do not necessarily reflect the opinion of the 
>IRCA, its editors, publishing staff, or officers
>
>For more information: http://www.ircaonline.org
>
>To Post a message: irca@xxxxxxxxxxxxxxxx
>


_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx