Topband: Beverage upgrade question

[K9AY]

Kenny,

You have gotten some good commments already, but I'll add my two cents. 

It's not always RDF that matters -- it's the shape and direction of the pattern. Remember that a pair in echelon will push the main lobe to one side, and have improved front-to-side rejection on the side with the rearward element. The amount depends on spacing. The best front-to-side should be in the more southerly direction, where more storms occur. 

Here in WI, I had an echelon pair (550 ft each) to Europe, with 70 ft offset and 50 ft separation. I could select them singly or as a pair. A/B comparison demonstrated substantial improvement in both F/B and rejection to the south and SE, which was especially useful for reducing QRM in pileups and contests.

73, Gary
K9AY



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Date: Tue, 23 Aug 2022 16:07:26 -0400
From: Kenny Silverman <kenny.k2kw at gmail.com>
To: topband <topband at contesting.com>
Subject: Topband: Beverage upgrade question
Message-ID: <37A3E9D4-31FA-4B56-BDDF-320C6BD50E11 at gmail.com>
Content-Type: text/plain; charset=utf-8

In a rural area with no significant man made noise, if you redesign a beverage for better RDF when do you start to notice a difference?

I?m considering upgrading my single EU beverage at 625? (190m) to a pair in echelon where will each be 550? (168m) with 20? (6m)  spacing . The increase in RDF is 0.8 dB - will it be noticeable?

I realize if there?s noise in a direction where you reduce the energy you will better hear the difference , but my EU beverage is quiet.   Though the F/B change will help with thunder storms off the back. 

Overall I tend to receive better than I transmit to EU.  

73 , Kenny K2KW 


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