Really, how about just signing up to the NBA League Pass? Sure it's expensive, but it doesn't need cable installation, just watch it from basically any internet accessible device.
If the team is on a national broadcast, it is also blacked out.
That being said, I listen to the finals on the local radio broadcasts via the NBA app because those are never blacked out.
https://www.quora.com/Does-the-NBA-League-Pass-offer-a-playo...