Sparky,
Most seasoned HAMS know about the causes and solutions for RFI/EMI,therefore I would seek his advice before getting started.There are many products that are used on power lines to filter unwanted interference like dimmer "hash" etc from desensitizing the receiver or distorting the transmitter .Most good receivers and transmitters have these filters already built into them.You may not have to do anything special if his equipment has the proper filtering.
Chris
