Hi Bob,
The Icom 706 needs a pre-amp to hear on LF, and if you are anywhere near AM transmitters you will also need a low pass filter since it will just overload with a preamp only.
--
73 Warren K2ORS
WD2XGJ 136-140kHz
WD2XSH/23 505-510kHz
WE2XEB/2 160-189kHz
WE2XGR/1 505-515kHz
FN42hi
http://www.w4dex.com/wd2xgj.htm