Been watching a new show on Discovery about some ranchers there. Seems at least two of them have HF radios, one for sure is a Spilsbury SBX-11A. They don't use callsigns, just Unit 2, Unit 5, etc. Well looking at some specs on that radio it's capable of 1.6-10MHz, 10W, 4 channels, and crystal controlled. I just watched episode 5 and when the radio was turned on I could hear a CODAR transmitter leading me to believe it's in the 4-5MHz range. This website says a couple common freqs to find them on are 4441/5031kHz but those may be more common in Canada. I also found that the state of Idaho has some HF licensed (WPVX422) in nearby Salmon, ID. I wonder if these are in common use out there or if they are unrelated and perhaps for DHS/SHARES use. Any suggestions?