This looks great. I look forward to seeing the STL and design files. BTW PLA held up well for 3D printed antenna parts in Brooklyn NY. It might melt elsewhere, but given the melting point is about 180C and it only got to about 40C on my roof, the 3D printed parts were fine. I had them up through winter and summer for many years. It seems UV resistant. While squirrels have access to the roof, they could not get to the 3D printed parts, so that was not an issue.
73 Chris
On Wed, Sep 23, 2020 at 12:33 PM E.Mike McCardel via AMSAT-BB < [email protected]> wrote:
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
Have you donated to get your Fox-1 Challenge Coin Yet? http://www.amsat.org/?p=3275
On Tue, Sep 22, 2020 at 8:46 PM Curt Laumann via AMSAT-BB < [email protected]> 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=s...
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Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb