What is RFI and TVI? It is interference cause by a radio or tv transmitter. What is MRRI? It is interference cause by your model trains. I had on my Ham Radio and stereo on when my trains were running. I was getting static on them all. I added a .01 microfarad capasitor across the termeninals. This eliminated the interference. I should mention the FCC frowns on this type of interference. Since this 'signal' is very weak. You will only interfer within 100 feet or less.
Andy KF4JQD
Andy KF4JQD