I haven't done much with these, but I followed one and I kept getting a signal strength indicator that helped me zero in on the source. But Now I've tried to find and follow more and I see that many of them don't have a signal strength indicator. How the heck am I supposed to zero in on these? For example, I think I've followed the Greenbriar signal to the point where I get no static, but I can't find this bunker by the river that the recording mentions. I know I can just look it up on the wiki, but I want to understand how I'm supposed to find these w/o cheating.

I had a hard time following a few, but really, it's just a matter of wandering around until you hear no static and a clear signal. And yes, on my end the Greenbriar one has been the hardest to find so far, but I'm not going to spoil the exact location for you. Just keep looking!