[Antennaware] Help with Short Dipole

[James Wolf]

Gerdas,

I believe that the answer depends on the amount of mutual coupling between
the two coils.  If there is no coupling, there should be no difference.
I would wind them in the same direction.

Jim - KR9U



Message: 1
Date: Fri, 8 Mar 2019 17:16:57 -0500
From: Gedas <w8bya at mchsi.com>
To: Antennaware at contesting.com
Subject: Re: [Antennaware] Help with Short Dipole
Message-ID: <db8cef09-ee9a-aaa3-c344-3307b7d15271 at mchsi.com>
Content-Type: text/plain; charset=utf-8; format=flowed

I have a quick question regarding loading inductor winding sense for an 
antenna like a center loaded dipole.

I am about ready to wind my loading coils on the same 26" long, 4.5" dia 
PVC form. I plan on leaving ~2" between the two inductors in the center 
of my form.

I was wondering if the "sense" of the turns of the 2 inductors should 
match those of each other? I think the mutual inductive coupling should 
be minimal but thought I should get a 2nd opinion before I go to a lot 
of trouble. My gut tells me to wind both inductors with the turns all 
going in the "same" direction.

Gedas, W8BYA

Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.




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Message: 2
Date: Fri, 8 Mar 2019 20:50:03 -0600
From: Mike Waters <mikewate at gmail.com>
To: Gedas <w8bya at mchsi.com>
Cc: Antennaware at contesting.com
Subject: Re: [Antennaware] Help with Short Dipole
Message-ID:
	<CA+FxYXhwoSY4usw=UYL+=orf_ywWLzPUqSLsgp5t8UXv5v4TqA at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

I'm not 100% certain what your inductor looks like. But in this case, you
should definitely wind them in the same direction. One turn should not look
like a left-hand thread and the other turn should not look like a
right-hand thread.

They may couple to each other, being so close.

Now that I think about it, I may be all wrong. :-)
I suggest that you ask this question on
https://ham.stackexchange.com. I guarantee you that you will get the
correct answer there!

73, Mike
www.w0btu.com

On Fri, Mar 8, 2019, 4:17 PM Gedas <w8bya at mchsi.com> wrote:

> I have a quick question regarding loading inductor winding sense for an
> antenna like a center loaded dipole.
>
> I am about ready to wind my loading coils on the same 26" long, 4.5" dia
> PVC form. I plan on leaving ~2" between the two inductors in the center
> of my form.
>
> I was wondering if the "sense" of the turns of the 2 inductors should
> match those of each other? I think the mutual inductive coupling should
> be minimal but thought I should get a 2nd opinion before I go to a lot
> of trouble. My gut tells me to wind both inductors with the turns all
> going in the "same" direction.
>
> Gedas, W8BYA
>
> Gallery at http://w8bya.com
> Light travels faster than sound....
> This is why some people appear bright until you hear them speak.
>
>
> _______________________________________________
> Antennaware mailing list
> Antennaware at contesting.com
> http://lists.contesting.com/mailman/listinfo/antennaware
>


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