[Steve Davis]

Yes, the line capacitor should be a y2 also, I would reduce the value to .01 to keep the leakage current to little lower value. The purpose of this cap is not so much to filter line noise (it is pretty ineffective at doing that). The main reason for it being there is to provide a ground path for the antenna circuit. Without this cap, the radio will have a much reduced sensitivity unless you provide a ground connection to the chassis. If this were my radio, I would add a second y2 cap to the other side of the line, ahead of the switch, just as Philco did with most of their other models. The reason I would do this is it will limit the voltage on the chassis to 60 or so no matter if the radio is off or on or which way the plug is inserted in the receptacle. 

Steve