[FXpert]

Picked up an old Zenith AM FM Model H724. Radio plays well for awhile and then gets bad static like a thunderstorm is approaching. Recapped and changed out all tubes. Tried tapping with rubber handled screwdriver both when static was present and when it was absent and it didn't seem to matter, making me think it is not an intermittent connection problem. I've read about this problem somewhere. Best I can remember the problem was inside one of the I-f cans. Maybe someone knows or has a better memory?
Thanks in advance.