{"id":13,"date":"2009-10-30T07:22:39","date_gmt":"2009-10-30T06:22:39","guid":{"rendered":"https:\/\/pa3csg.nl\/?page_id=13"},"modified":"2016-06-16T16:15:10","modified_gmt":"2016-06-16T14:15:10","slug":"construction-of-the-mount-for-the-37m-dish","status":"publish","type":"page","link":"https:\/\/pa3csg.nl\/?page_id=13","title":{"rendered":"Construction of the mount for the 3.7M dish"},"content":{"rendered":"

The dish mount was build on a trailer (ex Belgium army), so it could me moved and eventually be used on dx-peditions. The elevation system had to be used to lower the dish flat on the trailer.The horizontal “U- bar” is about 100KG heavy and about 26×8 cm. This was reinforced using 6x4cm steel. The system is “balanced” by 4 concrete tiles.<\/p>\n

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The dish in almost full elevation. Note that the vertical “U-bar” is reinforced by 2 pieces of sheet metal triangles. The elevation rotator is a satellite actuator. The box at the rim of the dish is for the TWT power supply.<\/p>\n

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The rear view of the system.<\/p>\n

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Another view of the dish. Note the 2 extra legs of the dish made out of “builders supports” (used to support roofs etc.).
\nThese are adjustable in height, easy to modify and easy and cheap to get.
\n<\/p>\n

The azimuth drive of the system. The same system is used as with the big dish. A chain drive 1 : 5 to minimize play. In the left under of the photo the pot-meter for readout. More is not needed. Once the moon is found, tracking is done on moon noise.<\/p>\n


\nThe elevation system is build around two 40mm bearings. You can see the reinforcing of the 2 U-bars better here. Again pot-meter readout.<\/p>\n


\nThe feed-system for the dish is build to fit a plastic barrel. The TWT is mounted directly to the feed.<\/p>\n


\nAnother view of the feed system. Preamps, an extra driver stage and power coupler are mounted on this side.<\/p>\n


\nA 5 ring scalar feedhorn is used to illuminate the dish. It is designed and build by Walter HB9AGE. The scalar ring is adjustable on the circular wave-guide.<\/p>\n

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\nA drawing of the scalar feed.<\/p>\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

The dish mount was build on a trailer (ex Belgium army), so it could me moved and eventually be used on dx-peditions. The elevation system […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":678,"parent":0,"menu_order":48,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"categories":[42,15],"tags":[],"_links":{"self":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/13"}],"collection":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13"}],"version-history":[{"count":3,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/13\/revisions"}],"predecessor-version":[{"id":832,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/13\/revisions\/832"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/media\/678"}],"wp:attachment":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}