My first Tv set!

I have been working on tube radios for about 2 years now. I ran into a deal on a philco tv about a month ago, that I could not pass up. It is a philco model 6604-50. The only problem is that I can not find any info on this tv at all, let alone a schematic. Is there anyone who can help me out here? If needed I can provide a picture of the tv. It has a 24ADP4 picture tube in it. Riht now I have no brightness at all, and a very high pitch sound. If I unconnect the speaker, the sound goes away, and I have a mild hum. Any help is greatly needed. Thanks very much in advance. BEN