u/mackle-mas

Hi all, I’m a sorta-new ham and wanted to double check my thinking In regards to an antenna I’m setting up. It’s a 40m doublet antenna with a length of window line running from it. I believe it’s probably 450 ohm though I’m not sure of it. It’s not quite long enough to reach into my ham shack. I’d like to have it run into a stretch of 50 ohm coax leading into my antenna tuner. Am I correct in thinking that I’d need a 9:1 balun where the window line transitions into the coax? I wanna make sure that there’s not a huge amount of signal loss or reflected power that could damage my set up. Thanks for any advice!