[TowerTalk] Loading Coils

[Stan Stockton]

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 <ab7echo at gmail.com> 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, john at kk9a.com 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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