Re: [IRCA] BOG question

[Nick Hall-Patch <nhp@xxxxxxxx>]

Thanks Chuck; I knew I could bring you out of the woodwork.

There's been a fair bit of hand-waving on the topband list about the 
BOG over the years, partly because anecdotally, either they "don't 
work", or that they have very good F/B.  K2AV has done a lot of 
measurements, and seems to conclude that a proper BOG (not a wire 
near dry ground) is actually a resonant 
antenna,   http://www.iv3prk.it/bog-modeling.htm puts forth the same 
idea.  This is for the limited frequency range of 160m; the entire MW 
band might prove interesting depending on length, ground conductivity etc.

I'd assume that a BOG at Grayland especially in the summer would act 
more like a Beverage.   Did you ever compare a "BOG" with a raised wire there?

Nick


At 00:18 2018-11-07, Chuck Hutton wrote:
> I don't see the self-terminating thing.
>
>
> It seems to me (unscientifically) that the losses are maybe 5 to 7 
> dB. That's a far cry from the 30 or more dB loss in a properly 
> terminated system.
>
>
> Chuck
>
>
> ________________________________
> From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick 
> Hall-Patch <nhp@xxxxxxxx>
> Sent: Tuesday, November 6, 2018 3:54 PM
> To: Mailing list for the International Radio Club of America; h 
> Walter Salmaniw
> Subject: Re: [IRCA] BOG question
>
> Have you had success terminating a BOG Russ?   (supposedly it is ~200
> ohms, rather than the raised Beverage's ~450 ohms).
>
> I think some have found that it is self terminating, to a degree, as
> there is quite a bit of loss on reflected signals.
>
> best wishes,
>
> Nick
>
>
> At 20:07 2018-11-06, Russ Edmunds wrote:
> >It isn't a dumb question because the answer is yes and no. If you
> >terminate a BOG at one end, that should more focus the reception
> >pattern in favor of the terminated end. If you're looking for
> >stations from the N, then terminate at the N end. In the event that
> >the desired result is an antenna which receives both N and S but
> >nulls E and W, then you lay it out N-S and do not terminate it.
> >
> >
> >
> >Russ Edmunds
> >
> >WB2BJH
> >
> >Blue Bell, PA
> >
> >Grid FN20id
> >
> >________________________________
> >From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of R. Colin
> >Newell <coffeecanuck@xxxxxxxxx>
> >Sent: Tuesday, November 6, 2018 2:53:57 PM
> >To: Mailing list for the International Radio Club of America; 
> Walter Salmaniw
> >Subject: Re: [IRCA] BOG question
> >
> >Dumb question --- Do BOG's get a termination?
> >
> >On Tue, Nov 6, 2018 at 11:52 AM Volodya S <canswl@xxxxxxxxx> wrote:
> >
> > > Stephen, my BOGs in Masset are about 750' long and I'm very 
> pleased.  Good
> > > for all Asia as well as Australia/New Zealand.    73, Walt
> > >
> > >
> >--
> >Colin Newell - Editor and creator *of *Coffeecrew.com
> ><http://www.Coffeecrew.com> and DXer.ca <http://www.DXer.ca> -
> CoffeeCrew 2018<http://www.coffeecrew.com/>
> www.coffeecrew.com
> Home of the Coffeecrew website - Alive and well since 1996! Canadian 
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>
>
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> Nick Hall-Patch
> Victoria, BC
> Canada
>
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Nick Hall-Patch
Victoria, BC
Canada 

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