hacker:: [[wilho]] description:: DIY variable length yagi / dibole antenna, made of cheap materials started:: <> ##content goes here = Adjustable length yagi / dipole = == DIY variable length yagi / dipole antenna == === Summary: === DIY variable length yagi / dipole antenna, made of cheap materials === Goals: === * made something similar than steppir/ultrabeam with fraction of costs * first try to make single dipole for 6-20M then 2-3 element 6-20M yagi. === Project status: === * Planing / prototyping [[attachment:planing1.jpg|{{attachment:planing1.jpg||width=500}}]] === Hardware: === * cheap DC motors with encoder + reducer (http://www.aliexpress.com/snapshot/7317871660.html) * empty fishing line spools * for actual antenna elements copper wire + strong fishing line * plastic enclosures * glass fiber fishing rods (8M rods without last 3M could be quite OK) * rasperrypi or some arduino variant * PicoBorg Reverse? * some microswitches for sensing "end of line" === Videos === https://youtu.be/Hz8wNOtJ5ZY === Pictures === https://goo.gl/photos/ncSLy9vy6DSQN5pH8 === Attachments === <> ---- CategoryProjekti