Re: [IRCA] BOG question

[Russ Edmunds <wb2bjh@xxxxxxx>]

IN its basic sense, the name "BOG" came from "Beveridge -on-Ground", and indeed one of adequate length should behave similarly.


I don't know either of the two people you mentioned, but any of my interactions with 160 meter guys  have resulted in some very strange ideas....



Russ Edmunds

WB2BJH

Blue Bell, PA

Grid FN20id

________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick Hall-Patch <nhp@xxxxxxxx>
Sent: Tuesday, November 6, 2018 8:33:49 PM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] BOG question

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<http://www.coffeecrew.com>
>Home of the Coffeecrew website - Alive and well since 1996! Canadian
>coffee expert.
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>
>
> >VA7WWV | Twitter @CoffeeCrew | Victoria - Canada
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>Nick Hall-Patch
>Victoria, BC
>Canada
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Nick Hall-Patch
Victoria, BC
Canada

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