[RFI] How to approach a neighbor?

[David Hachadorian]

I live in a tract neighborhood.  Everybody pretty much goes about their 
own business, and neighbors typically don't know each other or interact 
much.

Several months ago, a loud 24/7 RFI source started up in my immediate 
neighbor's house.  I set up a noise sensing loop and preamp on my side 
of the wall, and my MFJ Noise Cancelling**boxes are fairly effective at 
doing at least a partial null.  This past weekend, the noise disappeared 
from Friday until late Sunday afternoon, and it was wonderful seeing my 
Panadapters displaying bright waterfall signals on a dark blue 
background!  It made me realize how much I have been missing.

My real question is how can I tactfully approach the neighbors to see if 
they will cooperate on solving the problem?  I am willing to pay for 
fixing or replacing the device, but I am not a master of diplomacy, and 
I afraid to have the door slammed in my face.  I am open to suggestions 
on the best way to approach this.

Thanks in advance.

Dave Hachadorian, K6LL
Yuma, AZ