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Re: [TowerTalk] 30/40m on 1 boom

To: Douglas Ruz / CO8DM <co8dm@frcuba.co.cu>
Subject: Re: [TowerTalk] 30/40m on 1 boom
From: LB3RE K3RAG Stein-Roar brobakken <post@lb3re.com>
Date: Fri, 07 Oct 2016 19:54:48 +0200
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Hello guys
Do you know formula for distance between 40m to open sleeve 30m?

73 Rag LB3RE/K3RAG

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Best Regards Stein-Roar brobakken

Den 2016-10-07 17:49, skrev Douglas Ruz / CO8DM:
You can use Open Sleeve method...It is the same describe by Herbert.

Feeding only the 40m driven element and with only one boom.

The 30m driven element is not open in the center like classic driven
element...it is close like a director or reflector...just in one
piece.

GL,

Doug, CO8DM
----- Original Message ----- From: "Ed Stallman" <ed.n5dg@gmail.com>
To: <towertalk@contesting.com>
Sent: Friday, October 07, 2016 10:47 AM
Subject: [TowerTalk] 30/40m on 1 boom


I like building my antennas , I can build a shortened 2 element 30 or 40m using loading coils but not sure about having both on same boom . Be nice using one feedline but I'm okay using separate feedlines for each band. I see the big antenna manufactures doing it with success . Does anyone have a recipe for an antenna like this ? Or can point me to a URL that I've overlooked in my searching ? Using antenna software is above my pay grade but good with hand and tools

Thanks Ed N5DG



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