Just an alternate approach: I made my 160M "Tee" vertical with the tee top
long enough to resonate at around 1600 KHz. Then cancelled the inductive
reactance with a series air variable in a weatherproof box at the base.
73,
Steve
N6SJ
-----Original Message-----
From: TowerTalk <[email protected]> On Behalf Of Stan Stockton
Sent: Friday, August 1, 2025 4:54 PM
To: David Gilbert <[email protected]>
Cc: [email protected]
Subject: Re: [TowerTalk] Loading Coils
Those look very nice.
I’ve made a few coils for 40m elements and 160m loading coils using dead soft
1/4” aluminum tubing and a Crisco can used for a form. The spacers were made
from strips of Delrin about 3/4” wide and maybe 1/4”-3/8” thick. Drill holes
in the Delrin with whatever spacing you want, slice it through the middle of
the holes from one end to the other with a band saw and hold it together with
zip ties once all the turns are encapsulated. Three or four of these spacers
have worked well for a good sized coil.
73…Stan, K5GO
Sent from my iPhone
> On Aug 1, 2025, at 4:55 PM, David Gilbert <[email protected]> wrote:
>
>
> If you have access to a 3D printer this might be an inexpensive alternative:
>
> https://youtu.be/qAgF9Mzr8XM
>
> or
>
> https://youtu.be/S6spyk1GRoo
>
> Personally, I'd go with the version that has a slight taper. In most cases
> it would make no difference at all, and it's quite a bit simpler.
>
> OpenSCAD is free and extremely easy to use, and the parametric design allows
> you to make a coil exactly how you want it. If anyone needs it, I can make a
> video that walks you through the entire process.
>
> Dave AB7E
>
>
>
>> On 8/1/2025 1:40 PM, [email protected] wrote:
>> That is good information. Without the right equipment they would be
>> a challenge to homebrew. Thanks for sharing!
>>
>> John KK9A
>>
>>
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