Comment on My try for an apocalypse radio

tasankovasara@sopuli.xyz ⁨3⁩ ⁨weeks⁩ ago

• fullsquare@awful.systems ⁨3⁩ ⁨weeks⁩ ago

  that’s just a piece of wire, perhaps some thin steel rope in a heatshrink attached to center conductor and trimmed to length. 1/4 wave at 2m which is fine, 3/4 wave at 70cm which means it’ll radiate most of energy upwards (wasted) when put on a conductive plane. this works because the other half of antenna is low power, handheld radio and operator (coupled by hand capacitively). putting 100W into it would be a bad idea because all that current will travel along the coax down to radio and operator except this time there’s an option of rf burns. for this kind of money, i’ve made two jpoles with extension cables, and the most expensive part was enclosure

  i’ll make a post over the weekend about j-pole antennas that i’ve made recently. one of them even looks halfway professional

  source