I’ve 3D printed a primary coil form for a VTTC. See attached. Wire is 12awg, OD is 1ft. I think the turns were spaced too much.
I ended up switching to PVC of smaller diameter. I still use(d) the separate feedback form you can see on top, albeit mostly out of convenience.
PLA has perfectly fine dielectric properties. Comparable to PVC (though keep in mind PLA will have air).
> On Feb 18, 2023, at 13:07, Joshua Thomas <joshuafthomas@xxxxxxxxx> wrote:
>
> Has anyone experimented with 3D printing coil forms?
>
> I’ve used the pvc pipe on the past, but there are a few issues there: 1)
> Limited to particular diameters; 2) While ID is well-regulated, the OD can
> vary and be out-of-round; 3) Cutting to size is necessary.
>
> All of these issues could be solved by 3D printing, limited only to the
> dimensions of the printer. Better for SSTCs than big spark-gap coils. My
> main concern is the dielectric strength of common materials in 3D prints,
> like PLA. I can print PLA and PETG on my FDM printer. ABS would require
> some upgrades.
>
> Also, you could do some really odd stuff, like coils that changed diameter
> over the length!
>
> Anyone have comments or experience?
>
> Thanks in advance.
> --
> Joshua Thomas
>
> My new email address is: joshuafthomas@xxxxxxxxx
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