Thanks for all your inputs so far. Actually what surprises me is
there is not a whole lot to hear around that frequency band, at least
using my gear. I suppose if I use a professional gear with a decent
antenna, I could probably pull out some DX stations.

Same holds true around 7 MHz during early afternoons; noise is simply
annoying. When it gets dark, though, band becomes relatively quiet.
In contrast, 15 MHz band and 21 MHz band are free from noise. And of
course when I move around 100 MHz, audio fidelity is superb. :-)

TIA.
ish