[jph14]

Have tracked down a 2nd Philco 66- {different cabinet} that is almost all original and it works. I have been comparing the two with voltage readings at all tubes. The original is wired exactly like the new one but voltages are higher in the original.
On the original- soldered in the wire from white of 42 to 28 and 29 terminal. Hum on center tap of vol. control that is controlled by vol. control. Set up signal gen. on 460 and went through antenna- nothing through speaker.
Touched grid cap of 6A7-nothing
Touched grid cap of 75- nice clear tone.
Suggestions?

Thanks,
Joe