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Re: Topband: 2 Parallel Beverages

To: "topband@contesting.com" <topband@contesting.com>
Subject: Re: Topband: 2 Parallel Beverages
From: Jeff Woods <jmwooods@yahoo.com>
Reply-to: Jeff Woods <jmwooods@yahoo.com>
Date: Wed, 23 May 2012 07:19:57 -0700 (PDT)
List-post: <topband@contesting.com">mailto:topband@contesting.com>
I missed the original post, but if the question pertains to running two 
independent beverages in opposite directions on the same supports - Yes.  It 
works well.  


I began doing this last winter, adding shorter, opposite direction beverages to 
my NE and NNW (EU and JA) antennas.  Performance in the primary directions is 
not compromised by any discernible amount.  The antennas are completely 
independent, sharing only the PVC support mast.  The two "secondary" antennas 
share a feed point (DC relay switched) where the two primary antennas cross.  
The two primary antennas were up and running before the secondary directions 
were added. No changes in performanceof the primary antennas was noted after 
the addition of the shared secondary wires. 


>From a theoretical point of view, this is no different than the operation of a 
>typical 2-wire bi-directional array that relies on either wire working 
>independently as a single-wire beverage in generating the common-mode signal.  


Jeff W0ODS
Somewhere in Iowa



>
>>   For various reasons I am considering two single, parallel but 180deg 
>>opposing direction beverages on the same supports rather than a single 
>>switchable bidirectional beverage.  The bevs would be separated by 12 to 18 
>>inches or so. I've read that parallel bevs present performance degradation 
>>issues but has anyone had any experience with this type of setup versus the 
>>traditional bidirectional beverage? Thanks for reading this and for any 
>>thoughts you could offer.                                                    
>>             Mike  W2LO                           
>
>
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