I put down my first real BOG in Nov 2001. It was 625 feet aimed west and even without a shorter length one to phase against the results were mind blowing when compared to other antennas including a same length // classic elevated Bev and a same direction large KAZ antenna.
I got the idea after realizing that the 135 foot wire on the ground aimed south was doing a better job of getting a Texan on 1530 than was the southerly KAZ antenna. I figured that the wire on the ground was really a Beverage on The Ground. I believe that a BOG acts like a significantly elecrically longer antenna due to the known and measured fact that the velocity of propagation is significantly lower than an elevated Bev. I most definately observe a more narrow main beam with a BOG than with an elevated wire of similar length. If I had enough land, I'd probably use BOGs up to 900 or 1000 feet. Anything much longer seems too lossy except maybe on the very low end, and that can scramble the patterns' nulls, IMO. 73 KAZ ----- Original Message ----- From: "John H. Bryant" <[EMAIL PROTECTED]> To: "Mailing list for the International Radio Club of America" <[email protected]> Sent: Saturday, January 26, 2008 9:49 AM Subject: Re: [IRCA] Center-fed BOG? > Kevin, > > Kazaross has been the most active experimenting with BOGs.... for > about the last two years. Most of his BOGs now tend to be in the 400 > to 600 foot range, as I remember. However, I think that he started > out at about 200 or maybe even less. Laying on the ground tends to > make the thing act electrically longer, some folks think.... and > being on the ground, the side lobes seem to be significantly > reduced. I'd suggest that you run two coax lead-ins out to the > common ending area, use impedance matchers and terminate the far ends > as best you can. > > Alla that said, BOGs naturally respond differently to different soil > conditions, probably more so than air-suspended antennas. KAZ has > about average soil conductivity, I've got very high here in central > Oklahoma and yours is on the low side (I think) being near Puget Sound. > > I'm going to be trying the same thing here for some GY work... where > I think that Less (antenna) may be More (DX).... the experiments may > get done this spring, I hope. > > Let us know. > > If you don't have any impedance matchers, there is a nifty article at > http://www.dxing.info/equipment/ called "A Second Look at Fabricating > Impedance Transformers......" Look on the lower left of that web page. > > And, Kevin.... PLEASE let us know your results. As our hobby ages, a > lot more of us are considering downsizing to condo's, garden homes, > etc... and smaller antennas for the home place are in our futures. > > DOES ANYONE ELSE HAVE ANY DIRECT FIELD EXPERIENCE WITH 150 to 200 FOOT > BOGs???? > > > John B. > Stillwater, Oklahoma, USA > Rcvrs: WiNRADiO 313e, Eton e1, NRD-535(kiwa-mods) > Antennas: 700' NE/SW mini-Bev, Wellbrook Phased Array (pre-production > version) > > _______________________________________________ IRCA mailing list [email protected] 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: [email protected]
