----- Original Message -----
From: "R. Kline" <rikik@inter.net.il>
To: <Cqtestk4xs@aol.com>; <topband@contesting.com>
Sent: Saturday, October 18, 2003 3:01 AM
Subject: Re: Topband: One wavelength Beverage
> All of my 5 Beverages are BOG. The best wire for this is 2 conductor
> military field telephone wire. Each conductor has about half the strands
> made from steel and the other half are copper - all suitably plated. It
is
> extremely rugged stuff and holds up well. In Israel, it is occassionally
> found in scrapyards where I've bought a kilometer drum of the stuff (new)
> for a pittance. Besides its strength, another nice thing about this wire
is
> that by shorting the 2 conductors at the far end, it is possible to check
> the continuity with an Ohm meter from the feed end.
>
> I don't believe that this is a compromise antenna for terrain such as
mine.
> My QTH is on a rocky mountain top with very poor soil conductivity. Of
> course there is capacitance to ground. Some of my BOGs are unterminated,
> and others are terminated. Those that are terminated use a 200 ohm
resistor
> to a quarter wave wire just laying on the ground. I use the 1/4 wave wire
> termination because of low ground conductivity and the impossibility to
> drive in a ground rod - they always hit underground rocks. My experience
> has been that the unterminated BOGs have excellent F/B. Receiving from the
> fed end direction is down at least 2 or 3 s-units. I can't properly
explain
> why this is so, but I expect that it is because of the low impedance and
> losses. (the usual references predict only about a 3 dB difference). My
gut
> feeling is that in my particular QTH, there is no significant advantage in
> terminating the BOG.
>
Quite interesting. I believe that although the BOG looses gain because of
its lack of elevation, it has the advantage of no pick--up in the vertical
feed. The signal from an 8 foot vertical feed is about the same magnitude as
what you get from your BOG.
73 John K9DX
> Besides its simplicity, this is a rather stealthy antenna. From my house
> with a small yard, the BOGs go out into the surrounding public area. Two
> of them cross roads, so I have buried the wire a few inches beneath the
> (gravel) road.
> I've also buried more extended lengths - about 100 feet in order to hide
the
> wire from view.
>
> Although a raised Beverage would be more efficient, the BOG is
sufficiently
> efficient. They always pass the "acid test" - even when the band is
quiet:
> When they are disconnected from my FT-1000D, the background noise reduces
> significantly. Normally I don't require using my FET preamplifier. When I
> do, the antennas still pass the test.
>
> 73,
> Riki, 4X4NJ
>
>
> ----- Original Message -----
> From: "Herb Schoenbohm" <herbs@vitelcom.net>
> To: "Tom Rauch" <w8ji@contesting.com>
> Cc: <Cqtestk4xs@aol.com>; <topband@contesting.com>
> Sent: Thursday, October 16, 2003 11:35 AM
> Subject: Re: Topband: One wavelength Beverage
>
>
> >
> >
> > Tom Rauch wrote:
> >
> > >There is no reason not to use insulated wire except for weight, and no
> > >special reason to use it.
> > >
> > >73 Tom
> > >
> > >
> > I can think of one good reason to use insulated wire such as in a quick
> > BOG installation such as used in contests and dxpeditions. This is the
> > practice of running out 500 to 1000 feet of wire just laying on the
> > ground, terminated or unterminated. This is also especially important
> > were large fields containing cows and horses that would render a good
> > beverages useless in short order unless it had high enough supports.
> >
> > Although a BOG installation is not as efficient as the 8 to 10 foot
> > elevated beverage they do work well and sometimes make the difference
> > between having something or nothing except the TX antenna for
> > receiving. In short my advice is to keep several rolls of insulated #14
> > stranded electrical house wire around in the event you need some thing
> > up quickly.
> >
> > 73
> >
> > Herb Schoenbohm, KV4FZ
> >
> > >
> > >_______________________________________________
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> > >Topband@contesting.com
> > >http://lists.contesting.com/mailman/listinfo/topband
> > >
> > >
> > >
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>
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