AVS Special Member
Join Date: Nov 2001
Location: College Park, MD
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You are at a "paper clip antenna" distance from the transmitters, which are on Wiscomsin Ave, just before the Chevy Chase border. To be having trouble with channel 7 where you are, you are either down in a sinkhole or there is a Charles Smith building on your signal path.
I know this might not be easy to do if you only have a chimney mount at your disposal, but you probably could get better reception just by moving the antenna elsewhere on your roof. Sometimes, when someone is having a reception problem at a location where they should have gobs and gobs of signal, it is because there is a reflected signal also hitting their antenna that is unfortuitously out of phase with the direct path signal and largely nullifies it. It doesn't take much antenna position relocation to wind up with better results, though sometimes it might result in another of the reflected signals becoming problematic.
I live maybe five miles to the east of the towers and have a so-called clear line of sight to the DC towers, but I don't really have a clear line of site, because of vegetation, and my channel 4 comes and goes. I am in the commercial antenna business and carry more remedies on my truck than whomever you might call out does, but I am just too lazy to get up on my own roof and further experiment with the antenna because I have a second antenna pointed at Baltimore and can get NBC from there, so the only time I am inconvenienced by the channel 4 reception problem is when I am trying to watch reruns on CoziTV on 4.2, because there is no Baltimore CoziTV affiliate at present.