Oh, so you're gonna start on the "burn up" or "burn out" stuff. Tell me exactly what's going to happen. Believe you me, it'll work fine. The cable's not going to burn up or anything like that. The receiver won't malfunction because of it either.
I know that it's less than ideal. I wouldn't use it if it's avoidable. But I had no other choice. In order to get a new cable there I would have to tear out about six different sections of drywall.
If you want you can look at the actual specs of RG59 and see that it's not the ideal cable type but in many cases it will work.
Well, technically, it's possible. I already did. It works. Whether or not the installer is allowed to is a different question. I'm not sure that he was allowed to, but he did anyway at my insistance, and it worked as I expected. He wanted to staple the cable to the baseboard (not going to happen). If it didn't work I was going to run the cable through the walls...but again, I'd need to knock out drywall in six different spots. That takes days to fix. So my first idea was to try it as is, and it worked.
Now explain to me how if it works now it's going to all of the sudden fail.