I'm getting almost 60 channels for free. However, the channels associated with the local NBC affiliate are still affected by "fading." At first I wasn't getting the station at all. With the very big and ugly indoor/outdoor Clearstream 2V on top of a china cabinet, I was barely getting the channel at all. Now I have a Clearstream Eclipse mounted to the wall. In the first mounting position I optimized the NBC affiliate, and it came in strength 80+ perfectly, but then the CBS affiliate was getting constant dropouts. So I tried to optimize both channels at the same time with a second position. Now the CBS gets pixelation very rarely, like once an hour. But the NBC affiliate is getting pixelation about once every 5 minutes. This is known as "fading" described in this great article.
BTW I live about 5-10 miles from the broadcast tower(s) and they are just about perpendicular to the wall I am now testing indoor antennas on.
Fading can sometimes be assisted by making an antenna more directional. Here's a homebrew bowtie antenna designed to do this (for attic mounting). I could put my Clearstream 2V in the attic, but my attic is even more filled with metallic stuff (HVAC plenum and ducts including many return ducts) than the ground floor.
