Topband: Beverages 2 basic questions

[ZR]

In addition not all signals come via the direct Great Circle bearings for SP 
or LP, at least here in NH which is at a fairly high latitude. Having an 
extra direction or more such as over Africa for skewed paths has helped add 
a new one or an extra contest multiplier several times.

Next year Im planning to try a couple of Slinky Beverages again in order to 
get a 2-3 wave electrical equivalent for particular paths and narrow the 
beamwidth to get rid of EU "noise".

Carl
KM1H


----- Original Message ----- 
From: "Joel Harrison" <w5zn at w5zn.org>
To: "Eduardo Araujo" <er_araujo at yahoo.com>
Cc: <topband at contesting.com>
Sent: Saturday, December 01, 2012 9:15 AM
Subject: Re: Topband: Beverages 2 basic questions


> Eduardo - your arrangement should work well, especially if you place the
> main lobe into areas of interest and the "nulls" are into regions of no
> activity (or noise sources). It is a good general setup.
>
> Everyone may have their own specific reason for utilizing multiple
> Beverages, but mine is very simple. I have nine Beverages that are 
> targeted
> to specific areas for specific reasons; End fire Bev's on Europe, one to
> JA, one to the Caribbean, one S-SW for LP/skewed Gray Line to the far 
> east,
> and so forth. The reason is while a Beverage in a general direction will
> work well, in contest times or times when you are trying to pull a very
> weak DX station out of the noise that extra 1 dB in pattern improvement
> from the Beverage being aimed at a very specific area may make the
> difference between a completed Q or a failed one (of course the noise
> reduction from other directions is key).
>
> Others may have varying reasons that are just as valid.
>
> Your setup should work well, especially after you install it and begin
> comparing signals and making future improvements. My arrangement works 
> well
> for me here in Arkansas but is the result of 20 years of tweaking,
> rebuilding, reconfiguring, and comparing different RX antenna arrangements
> and your efforts will allow you to analyze how things perform at your QTH.
>
> GL.
>
> 73 Joel W5ZN
>
> On Fri, Nov 30, 2012 at 1:46 PM, Eduardo Araujo <er_araujo at yahoo.com> 
> wrote:
>
>> Dear Topbanders, I am planning my next move with the beverages and I 
>> would
>> like to hear your opinions about 2 areas.
>>
>> Looking at the pattern response for beverages in for example ON4UN book, 
>> I
>> found that If I install 4 x 600 feet or 5 x 900 feet beverages, I should
>> cover 360 degress with deeps of no more than 3 or 4 db respect the main
>> lobe.
>>
>> Taking into account that most people will not work extra without any
>> benefit my first question is:
>> 1 - Why many DXers and contester install 10 or 12 direction beverages ??
>> What am I seriously missing with my simple analysis?
>>
>> 2 - Is there a meaninfull or simple way to determine if at my location is
>> worth to go from 600 to 900 feet?
>>
>> I did some measurements a) I injected a signal  into the beverage and
>> using a current probe, I meassure signal strength in an Smeter.(I 
>> replaced
>> the mA with the input of a transceive)
>>
>> Variation was about 10db from begining to end of 900 feet. Curiously the
>> 600 feet one gave aprox same result but I recognize S meter granularity 
>> was
>> not good.
>>
>> b) I disconnected termination resistance and the signal stregth with or
>> without it was 8db.  900 feet Bev gives about 20db F/B in broacast band
>>
>> Many thanks in advance to all
>> _______________________________________________
>> Topband reflector - topband at contesting.com
>>
>
>
>
> -- 
> 73 Joel W5ZN
>
> www.w5zn.org
> _______________________________________________
> Topband reflector - topband at contesting.com
>
>
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