[amsat-bb] 70 cm Lindenblad progress - notable support structure for parasitic elements

[Stefan Wagener]

Very nice! Will you make the STL file available?

73 Stefan, VE4SW

On Tue, Sep 22, 2020 at 7:46 PM Curt Laumann via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> Hi All,
>
> Over the past few months I've been designing & assembling a few 70 cm
> Lindenblads.  The current version is shown in the attached picture (link
> below).  Arrow shafts are used for parasitic elements.  The shafts are
> bonded in place with fiberglass resin.  Rubber end caps (from McMaster)
> cover the shaft ends.
>
> The notable part of this design is the central structure (supporting
> parasitic elements) is 3D printed as *one part*.  Virtually all of the
> angles and spacings are achieved in the 3D printing process.  After
> struggling to align and bond various PVC and irrigation parts in other
> versions, it was a breeze to assemble this design:  one nylon machine
> screw, one nut, four bonding points.
>
> The design could be easily modified to accommodate 0.125 inch diameter
> parasitic elements as well.
>
> Regards,
>
> Curt / K7ZOO
> Tucson AZ
>
>
> https://drive.google.com/file/d/1i2c6T5lZtI00KChbJuyphvvechzBvlNw/view?usp=sharing
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