Kaito KA-31 Shortwave Active Loop Antenna
It may come as surprise to some readers but there is still a dedicated audience (albeit insignificant in comparison to that of new media) for the information broadcast on the shortwave bands. Of course you would have had to be weaned on the "crackling" reception of most stations to be able to put up with the unpredictable reception that has been the one barrier to attracting new, younger listeners. Reception can however be improved by simply attaching an external antenna such as the Kaito KA-31 to your radio.
'The compact Kaito KA-31 Shortwave Active Loop Antenna tested best among indoor world-band antennas. This marvel hangs from a window or a curtain and attaches directly to a 1/8” ANT jack or simply clips to your radio's existing antenna. 3.9-22 MHz frequency coverage, with a 15-foot feed line. Enhances the reception of any desktop or portable shortwave radio. Runs on two "AAA" size batteries (not included). For indoor use only.'