There are several things that affect TV reception... THe fixed antennas are (My opinion) Junk. they have limited range (Will explain if I don't forget) I often find I have different "performance" parked within inches of the same part. For example WHen I last parked at the Thousand Trails campground I got one channel well out of Detroit.. The time before one channel well out of Sarnia. SAME SITE THE EXACT SAME SITE.
Right now what we hams call "Band conditions" basically suck.
I used to have a link to a page that showed real time band conditions. But alas it 404s now (page not found) and I am unable to find another site like it.
But as conditions change (we are at a LOW right now) what you can see changes
Some things that might improve your reception
1 A better antenna (Winegard Sensar IV)
2: Sensar pro Works with most POWERED rooftop antennad (Amplified)
Why is a directional antenna better.. To demo you need a pencil and a map, a push pin and the chain from a necklace (or a big string loop).
Push pin goes into the Map at a spot that represents your antenna (Need not be accurate since this is a "Demo")
Now arrange the necklace around it in a perfect circle centered on the pin.
THis is your "FIXED (Omni Directional) antenna.
Now Pull it out into an oval shape about 2 to 1 ration on the length v/s hight.
THis represents the WInegard Sensar II and III (Batwings) Without the Wingman NOTE this is not 100 percent (You need to move the chain off center a bit)
Now pull it into an egg shape with the pin around 1/4 the way from the "Big" end to the small end (along the major axis again) Notice how much farther out along the main axis the "Tip" (small end) if the chain is now?
THat's why Directional antennas are better.
Another thing if the Rig is parked long term.. HEIGHT is might.. if you can find a way to put a bigger antenna up higher.. The higher the better.
One person in the campground I'm in now has a yagi on top of a 10 foot mast
I'd go with my 20 foot flagpole or higher but.. I'm using the Sensar III _+ WIngman + Sensar Pro and .. more tv than I can watch.
Warning Politics... Recording the debates this week (end politics).