[Jeffhs]

With its 6-tube chassis, shielded antenna and all, your Zenith C624 clock radio should be getting everything from Maine to Miami, especially at night -- figuratively speaking, of course. Did you check to see that the antenna is connected? If all you're hearing inside your house with this radio is static and noise, a broken antenna connection sounds very likely. If this is indeed the case, taking the radio outside won't help anything -- you will still hear the same static/noise as you do in the house. If reconnecting the antenna doesn't help (or if the antenna connections are OK), however, there may be a weak or dead tube somewhere in the set, in the signal circuits. Do you hear anything at all, even strong local stations? If so, the radio is working up to a point, but still not as the designer intended. Another possibility is that a component between the antenna and the grid of the RF amp tube is open; this of course will kill all reception. However, I'd look at the antenna before suspecting anything else. Many times it's the simple things that cause the most trouble, and that are so often overlooked.