Most annoying RFI type of mess I have been involved with, other than my present HF killing interferences at work and home, it was back when I got started decoding HF RTTY, SITOR, FAX, etc. The monitors I tried were awful, the cables were bad, the decoder box and most of the printers would spew HF spurs and it was just a hassle sometimes to really get anything to decode unless the signal strength was huge, and then of course the summer static crashes were another thing to deal with. I had at one point a really ugly amber monitor that had it's plastic cabinet painted with copper paint inside and partially outside too, and cables with dozens of ferrite cores on/in them. Eventually, I got rid of about 95% of the hash by changing monitors until I found one that had a steel case on it, cables with built in ferrite chokes in them (pure luck I was showing some guy my HF stuff and he gave me the name of a company who made custom cables with ferrite chokes and full shielded options), and adding a ton of grounds. $$$$, but those cables worked. About the time I got everything cleaned up, around 1990, the amount of HF stuff worth decoding dropped tremendously and kept declining as it moved to satellite. I spent a lot of hours using my Info-Tech/Universal decoder boxes, and a lot of money on them too! Weird thing, I can still remember many of the keyboard presses to switch polarity, etc. My NRD-515 and 525's were always on and my mother used to complain endlessly about the dot matrix printer noise when I was printing FAX maps and pics. One time we went on a short trip and I had forgotten to turn off the auto print on my M-7000, and went away all day, and came home to about 3/4 of a box of that tractor printer paper all over the room. The auto start worked OK, but it rarely stopped very well. Summer static crashes kept it going, until it got a solid stop signal. I still have some really scary Telex messages from cruise ships that were stuck in port due to being unsafe and the list of defects on one of those ships is like 20 feet long. Stuff like rotted out lifeboats rats in huge numbers, and my favorite, life jackets that were falling apart due to mildew and mold. And then there was the crewmember on another ship who went crazy and attacked the captain. He was sedated by the ships doctor, dropped off at a port with some cash and a plane ticket and sent back home. But the safety stuff on those ships was endless, and prevented me from ever even think about taking one, as all the "Big Name" ship companies had scary bad ships out there.