[1] What is a shortwave radio?
  
   On the technical side, it's anything that can receive AM-type audio
   transmissions between 3 & 30 MHz. The main characteristic of signals
   on these frequencies is their ability to propagate for long distances,
   making possible such world-wide communications as co-ordination of
   long-distance shipping and international broadcasting. A shortwave
   radio will usually receive transmissions below 3 MHz, especially those
   in the AM broadcast bands on mediumwave & longwave, or above 30 MHz,
   such as those in the FM weather band as do some CB radios.
     _________________________________________________________________
                    optimised for screen reading in pine