Ah, the old Trash 80. That and its contemporaries are a major reason I have the job I do today. We ordered a Trash 80 for our lab when I worked for the Navy. We got a call from the RS store on a Friday that it had arrived. As the store was on my way home I volunteered to pick it up and bring it in on Monday. Needless to say, it didn't stay in the box over the weekend.
When I fired that thing up it wiped out every receiving device in the house. TV, radios for any service for which I had a receiver. You name it, it was buried. When we looked at it in the lab the discussion centered around where to license it, as it clearly was a radio transmitter. To the question, "In which serviced should we license it?", the answer was, "Yes! Beacause it is in all of them."
If you've ever wondered why the TRS-80 Model 1 disappeared from the market around the end of September 1983, it is because when the FCC created the limits for emissions from digital devices they allowed products on the market prior to 1 October 1981 to be brought into compliance or taken off the market by 1 October 1983. The TRS-80 didn't comply (not by a long shot) and bringing it into compliance was beyond the state of the art in EMC design at the time. Thus, it died.
BTW, my Commodore 64 is in a box out in the garage someplace and probably still works. It has an FCC ID number label on it, but the one time I threw it in the EMC lab with no peripheral devices connected, it failed. Darn, that was a long time ago. Oh, and my C-64 has a serial number in the 30,000 range. An early example of a very successful computer.