Thanks for all of the info. In this neck of the woods, I doubt I would cause any interference running a little hot.
HAHAHAHAHAHAAHA! Thanks, I needed that laugh... :
Seriously dude, there is NOWHERE in greater Boston that you could run a pirate transmitter at
any power and not technically cause illegal interference to someone. The dial is just completely packed here. Christ, you couldn't do it anywhere east of the Quabbin, and most of the places west of Quabbin would be impossible, too. Ditto for all of CT and RI, and most of the southern halves of NH, VT and ME.
Now whether you cause real-world interference is, of course, entirely dependent on local terrain, the receivers + antennas being used, and local atmospheric conditions. That doesn't mean it ain't illegal and it doesn't mean some station won't claim interference to the FCC, quite possibly resulting in a $10,000 Notice of Apparent Liability arriving in your mailbox.
FWIW, though: if you happen to be setting up the station on a large parcel of land, you can run an AM station under Part 15 rules at any power as long as the signal doesn't exceed a given level (it's frequency-dependent) measured at the edge of the property. This is a handy way for rural college campuses to have more powerful stations and still be within Part 15 rules. However, the power level is low enough that unless you have a HUGE piece of property...somewhere on the order of miles across...you're still going to have pretty low power levels. (i.e. milliwatts)