Hi Gary, Joel and Dave, again I appreciate the sage advice and experiences you
all have had. Overall it sounds like there will be merit going to the echelon
pair. The azimuth is 37 degrees so the slight shift in the main lobe won’t be
much an issue. I already modeled it in a more realistic scenario where the
wires are not totally parallel or same height. It loses a few hundredths of a
dB of RDF as you all know the configuration is reasonably tolerant.
I have all the parts to make it happen so it’s just a few hours work (I just
hang the insulated wire from branches in the forest).
73 , Kenny K2KW
> On Aug 24, 2022, at 2:58 PM, K9AY <k9ay@k9ay.com> wrote:
>
>
> 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
>
>
>
> ---------------------------
> Date: Tue, 23 Aug 2022 16:07:26 -0400
> From: Kenny Silverman <kenny.k2kw@gmail.com>
> To: topband <topband@contesting.com>
> Subject: Topband: Beverage upgrade question
> Message-ID: <37A3E9D4-31FA-4B56-BDDF-320C6BD50E11@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
>
> Virus-free. www.avg.com
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