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