this post was submitted on 11 Apr 2025
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No need for expensive coax. Rg214 is both great and reasonably priced, and even that is probably overdoing it. As for the antenna, if you have a balun, trash will do just fine - just make sure it's the correct amount/length of trash for the frequency you're working with, but I'm sure rg58 would've been fine too.
Source: I used the gutters on my previous house to listen in on maritime HF DSC transmissions from around the world. I used a moderately expensive cable, though, as I happened to have a bunch of leftovers at work I could just take.