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 <towertalk-bounces@contesting.com> On Behalf Of Stan Stockton
Sent: Friday, August 1, 2025 4:54 PM
To: David Gilbert <ab7echo@gmail.com>
Cc: TowerTalk@contesting.com
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 <ab7echo@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@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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