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Front face of a machined aluminium hyperbolic 68 mm diameter subreflector for a Cassegrain microwave dish antenna. The surface is very smooth but not highly polished

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https://mastodon.radio/system/media_attachments/files/112/640/624/163/267/864/original/e1bc6d175ae279ac.png

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  1. Embed this notice
    Neil G4DBN (g4dbn@mastodon.radio)'s status on Wednesday, 19-Jun-2024 11:45:34 JST Neil G4DBN Neil G4DBN
    in reply to

    And this is what the printed Thing is for. Three carbon fibre rods flare outwards from the three sockets and go through metal sleeves to a support ring behind the dish. There's an M12x0.5 mm thread inside the hyperbolic sub for fine focus adjustment. One turn is a fifth of a wavelength at 122 GHz #hamradio

    In conversation about a year ago from mastodon.radio permalink
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GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.

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