[RFI] RFI searching

[Van Fair]

I am an average ham and over the past 50 years I have been the victim of numerous RFI problems from heataing pads to AC line noise. I am considering buying one of the all band 30 Khz to 2000 Mhz hand held receivers for multiple reasons but one of the justifications would be to use it with a directional antenna to find RF. Any one able to confirm that this is a good or bad idea. Thanks Van