Propagation Summary :: 3.5 - 4.0 MHz (80m, 75m)

The lowest HF band is similar to 160 meters in many respects.
Daytime absorption is significant, but not quite as extreme as at 1.8 MHz.
At night, signals are often propagated halfway around the world.
As at 1.8 MHz, atmospheric noise is a nuisance, making winter the most attractive season for the 80/75 meter DXer.