[TowerTalk] DIY Air Wound Coils

[Grant Saviers]

If a 3D printed bar material is RF & weather ok, then even FDM could 
taper the slot a bit or add a small entry bulge to capture the wire. 
The resin printers would even be better since a homogeneous solid part 
can be made and they are happier printing overhangs. I agree, likely one 
model for each wire gauge. A smart CNC programmer could parameterize 
everything to automate the STL file generation - wire gauge, & bar slot 
pitch, taper, w, l, h.

The commercial CNCsomething open feed line spreaders work the way you 
want but only for 14ga THHN wire IIRC.

Grant KZ1W

On 1/18/2023 17:15, Brian Beezley wrote:
> "My final choice was slotted acrylic bars for strength, water and UV 
> resistance, and ease of solvent gluing the wires in place."
> 
> Grant, after seeing several neat coil form designs in the style of Air 
> Dux, I've been wondering if a precisely shaped groove might hold the 
> wire reliably without glue. I imagine it snapping into place with a 
> satisfying sound. I suppose this would work well only for a single wire 
> gauge.
> 
> Brian
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