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

[E.Mike McCardel]

Curt,

Your whole process and experimentation of these would make for an
interesting AMSAT Journal article.
If you have the time, please consider writing it up. Pictures included.

E. Michael McCardel, AA8EM, former KC8YLD
Former Senior Editor for AMSAT News Service,
Past VP Educational Relations for AMSAT-NA

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http://www.amsat.org/?p=3275


On Tue, Sep 22, 2020 at 8:46 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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