Total posts : 45366
The Ramsay FM100B is not certified, either in the U.S. or Canada. The reason it is a kit is that you cannot sell uncertified transmitters in either country; the assembled version was only available for export (at least theoretically).
I did have a 100, and experimented with it. I ended up getting rid of it because it was too powerful for even Canadian regulations, although I could mismatch the telescopic antenna enough to get it reasonably close. However, it was still more powerful than a correctly tuned Decade MS-100, and it wasn’t worth the risk to use it. I did hook it up (very) briefly to a Comet quarter wave antenna and was able to get over 2 miles range to a good car radio on a heavily forested island while broadcasting in mono. Needless to say, that signal was far in excess of the legal limits in Canada or the U.S.
As I posted earlier, the 100 is spec’ed at around 10mw, and it goes to show that you don’t need much power to get significant range on FM with a good antenna. That’s why I believe it’s necessary to talk about field strength rather than power, as field strength translates directly to range (whereas with power, range totally depends on the type of antenna being used).