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Re: LF: Re: Helically Wound Antennas

from [Gaj Kumar] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: Re: Helically Wound Antennas
From: Gaj Kumar <[email protected]>
Date: Sat, 29 Dec 2018 06:48:31 +0530
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=LrT3J5fpsMOeJKiHcNZdZ7pZawJT2CD2016OGCA5zl0=; b=KESoJO5sFOnFfsxdT+rJHOnySrOjl6XwkdpDZgGPeHJIH3Dlqpju9n77SbA2QB4/Fl I/Vw+X6n58glsASvfWhfgwcYv1sAWaka8l++c0FNQLNLkm3W/epslENRdFJiz3NV3aNp iJC5FXrwJoPFgppFB/gZAfDBGZNxZuBLLYJ/QTAiCnV1adGJZ7oKXV0q0mWeSAQkO6I3 Y7E9N9urjKEQt9JkQs6MoBNj8yu/v1wh3tjlRKUK9vfC/g717o0/UCW+pb4v1FJTijWt 1YjMBA6Bxxmb3dfsaqlF88/za88kJC1UMmpoqYHplhtnMYr8ashxx1luaeFegIoYSP1y mWHg==
In-reply-to: <[email protected]>
References: <trinity-b78c3405-30a1-416b-b682-728912b2c6d7-1546010438188@3c-app-mailcom-bs03> <[email protected]>
Reply-to: [email protected]
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Dear Eduardo

I have built several helical verticals for 40m and 20m .
I always used Half wave length of wire to wind it fully .
Then tuned it with a GDO for some resonance and tapped a feed point .
They worked well as fixed and moblie antenna .
Happy new year to all have a great time

Best Regards


Kumar
VU2BGS

On Sat, Dec 29, 2018 at 12:17 AM Rik Strobbe <[email protected]> wrote:

​​Hello Eduardo,


Sorry, but I don't have any of his formula's.

But I send this reply in cc to the RSGB LF reflector, maybe someone can help.


73, Rik  ON7YD - OR7T


Van: Eduardo Garcia <[email protected]>
Verzonden: vrijdag 28 december 2018 16:20
Aan: [email protected]
Onderwerp: Helically Wound Antennas
 
Hi,
 
I have been reading some sections from your page on 136kHz
 
Very good write up, many thanks for making it available. I am not really into 136kHz, but I landed on the page looking for ways to model a helically wound antenna. You give some equations for inductive loaded antennas and I also see many references to G4FGQ pages.
 
I am also familiar with the programs that G4FGQ wrote to calculate helically wound antennas. Sadly he is SK, so finally here is the question, would you know what equations he may have used in his programs?
 
Many thanks in advance,
Eduardo, M0KEK
 
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