[Tigerbangs]

You are using a Terk-RCA antenna that has been discontinued. Sorry to say that it's not the best. You have many stations available to you from both Boston and Providence. Both city's signals are strong enough in your location so as not to pose much of an issue, however, please remember that Providence CBS and FOX are on VHF channels, and that the antenna that you are using is not likely to be effective when looking for those channels.

Boston's stations are all on UHF, and could be received with your existing antenna without much of an issue if sufficient height is used, and the antenna is aimed at the Boston transmitters, which lie 70 degrees from your location as measured by a magnetic compass.

My best guess is that you have inadequate multipath rejection from your existing antenna. I don't believe that it's an issue of signal strength, but one of signal QUALITY. A highly directional UHF antenna like an AntennasDirect 91XG in place of your existing antenna is likely to make the problem much less severe.