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

[Curt Laumann]

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