Tv reception in L.A.



I bought a leaf antenna several months ago, scanned for channels and found plenty. Including PBS, and I'm pretty sure the Fox station. I have an HDTV that's a few years old. I cut the cord Friday, and checked OTA channels last night. No Fox, and no PBS. And when I manually go to PBS station (channel 50), it flips to channel 20 (a home shopping channel). I emailed PBS SoCal about problem, but haven't heard back. And haven't contacted fox channel yet. Found this forum, wonders if anybody else is having same problem. I'm in Pasadena area, so within range of transmission towers on mt. Wilson. I'm in an apartment, so no outside antennas, and apartment faces north. Thanks!