Mike has a Channel Master DVR and he had to install his own hard drive because the one it comes with is really small. But it was worth it because he doesn't have to pay a monthly fee.
The tuner, though, loses signal strength and degrades in quality sometimes. Leo says that's odd because digital should either work or not. It doesn't degrade well.
In the chatroom the problem was diagnosed and it matters where you have the Channel Master in your home, believe it or not. Leo thinks there may be some crosstalk or some analog misbehavior. It could be that Mike is using an indoor antenna, which can be easily interferred with. It's going to take a lot of trial and error to tweak the location. Leo advises checking out TVFool.com.