Before revision: Grundig Satellit 400 solid-state, digital shortwave receiver, c. 1986 Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW).
After revision: short description|Radio transmissions using some wavelengths between 10 m and 100 m a radio station broadcasting at 1000 AM has a wavelength of about 300 yards because AM radio waves are hugely longer than FM wavesGrundig Satellit 400 solid-state, digital shortwave receiver, c. 1986 Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW).