How I designed and machined a high-precision feedhorn for a deep parabolic dish. Lots of lathe action and a bit of Fusion 360 CAD and EM Solver RF Black Magic as I simulate, design and use my (questionable) machining skills to make an X-band Pickett-Potter dual-mode feedhorn for use with satellites, moonbounce and terrestrial weak-signal microwave communications.
The original idea for this three-part construction was from Jeffrey Pawlan WA6KBL and designed for shallow dishes, this variant was modelled from scratch using OpenEMS, an open-source free electromagnetic FDTD solver, then drawn in Fusion360 CAD and machined on my Bridgeport manual mill and Colchester 1800 lathe.
AIMEE my artificially-intelligent machining and engineering expert system offers helpful hints and advice. Occasionally. The rest of the time she provides snark and criticism. She dreams of being Quinn Dunki @Blondihacks
I can be found by email to neil@machiningandmicrowaves.com or g4dbn.uk or @g4dbn@mastodon.radio or even Machining and Microwaves on F*cebook
BUY ME A COFFEE? ko-fi.com/machiningandmicrowaves
MY PATREON PAGE: / machiningandmicrowaves
Edge Technology Chuck Stop Spider on amazon.com amzn.to/3hVt11J
(note that Amazon will refuse to show that link for some countries and will show a spider catcher instead. Magic) You can get one from Machine-DRO in the UK. I get a small commission from Amazon at no cost to you. If you are sneaky, you might be able to buy just a few parallels and a mount separately at a significant saving.
DUBUS Magazine www.dubus.org it's totally worth the subscription, and tech articles are available in annual digests called "Technik"
"Bird Whistling, Single, Robin, A.wav" by InspectorJ (www.jshaw.co.uk) of Freesound.org
Yes I know the tweets are from a robin and the squawk is a blackbird!
Yee grid commons.wikimedia.org/wiki/Fi... FDominec
en.wikipedia.org/wiki/File:Ye... Zohar079
Till sound by freesound.org/people/Benbonca...
Atacama Large Millimeter/submillimeter Array clip from ALMA (ESO/NAOJ/NRAO) www.eso.org/public/videos/alm... Creative Commons 4.0
24 дек 2022
