What you need for your Icom IC-R5 is the "Portable Wire Antenna"
(PWA) that was created and written about by Tom Sevart [N2UHC].
Portable Wire Antenna "PWA" for 'portable' Shortwave Radios.
- - - To 'quote' Tom Sevant
"This is an antenna I put together after having problems
with overload on my Sony 2010 portable shortwave receiver"