[TowerTalk] 40M rotary dipole

[Stan Stockton]

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 at 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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