Adding this DSP Front end to your LR station can do wonders for EMI problems and gives LR super reception ability.  External AGC keeps things steady for LR now on manual but really using AUTO AGC that other signals cant over ride.  If EMI is killing your signals, give this a try.  It has hum filters that work better than the ones in LR.  If you see lines going through your stations plot.. You have EMI!  So does anyone else using your station.  

Many stations have dead front ends when you connect.. you get no responses from the station.. Your station should always be sending out strikes it receives.. This external AGC will make sure that is happening.  As the propagation changes the AGC follows it.  The one in LR is affected by EMI, this one is not.  This removes the hum from power line EMI like you wont believe.  

Put your antenna on any frequency, then you can convert it back to LR's frequency of 11.025 kHz by typing in the LO needed to do that. (11.025+ant freq).

The USR file on the page will set all this up for you to get started...  The cost of this is free except for the sound card needed to run it. Make sure its one that will work with LR.