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Re: [TowerTalk] 40M rotary dipole

To: Dave Sublette <k4to@arrl.net>
Subject: Re: [TowerTalk] 40M rotary dipole
From: Stan Stockton <wa5rtg@gmail.com>
Date: Wed, 20 Sep 2017 15:45:10 -0500
List-post: <mailto:towertalk@contesting.com>
Dave,

I hope you do put it up with a temporary choke and then replace it one 
afternoon with the 6 toroid choke.  

Take notes or record to document the difference in receive noise.  I am 
interested since I am and always have been in position of "what you don't know 
doesn't hurt you."

I have never had a "proper" choke on any antenna in 50 years of being a ham and 
really want to know what I'm missing.

73.. Stan, K5GO

Sent from Stan's IPhone



> On Sep 20, 2017, at 9:31 AM, Dave Sublette <k4to@arrl.net> wrote:
> 
> Thanks for all the suggestions on the RF choke.  I read the article by K9YC 
> and concluded that the best approach wold be to wind RG8X around 6 Fair-Rite 
> toroids made from type 31 material and 2.4 inches in diameter.  The big 
> problem is they are listed at over $17 each from the distributors.  I will 
> need 18 of them eventually.  6 each for this dipole and two more yagis.  
> That’s a large price tag, but still cheaper (and better performing) than the 
> commercial units available, according to K9YC.
> 
> I have (again at the suggestion in the paper by K9YC) sent a request for quit 
> to Fair-Rite, asking what quantity I would have to buy in order to get “a 
> decent price”.  It might work out that I could make a large purchase and 
> offer kits of toroids to the group.  I’m not looking to make money.  I only 
> want to have a good choke at the lowest price I can find.
> 
> I may put the antenna up with a temporary choke on it and replace it when/if 
> I can get the toroids.
> 
> I will keep you informed as to what I find.
> 
> I appreciate your inputs on this project.  It’s been fun.
> 
> Dave, K4TO
> 
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