I assume you refer to HF which was largely abandoned
by commercial services during the 90's for satellite
and other higher-frequency based modes. HF does
not readily lend itself to new digital modes, thus the general
vacancy therin.

"Jim" wrote in message
om...
Except for few ranges, most bands don't have any activities at all. I
think HF spectrum is underutilized. Or is it my receiver/antenna
that's not picking up signals? What is your opinion/experience?