Comment on My try for an apocalypse radio
tasankovasara@sopuli.xyz 4 days agoYou got me thinking about a roll-up yagi: elements laminated on something that can be rolled up lengthwise and flown like a flag, but with channels at the top and bottom edge that take something to stiffen the ‘flag’ :)
Will definitely also revisit the J-pole design. Come to think of it, so far the only store-bought antennas I have are on the car. Perhaps a little bit of ethos should be applied here – only DIY antennas for HAM activities. As for the radio, I’m going to try to never charge the battery on anything but the solar panel, so that all of my operating will be independently powered :D Right now it’s on a charger though, to get it to full capacity before the package is finished.
Thank you for the inspiration!
fullsquare@awful.systems 4 days ago
i’ve seen someone made rollup j-pole on basis of fabric strip, with conductive fabric strips sewn on. so you could probably take an actual flag and do the same, because yagi elements need some thickness and flat strips are good enough. this looks a lot like yagi printed on pcb board, except that pcb board is stiff, and you’d need some rods to stretch the fabric. so there already is need to store long sticks. instead, you can make a regular yagi but with elements that can be detached when not in use. i bet somebody made 3d-printable clamps like that
there are commercial antennas available, but you will pay an arm and leg