[Jbaker]

Thanks for the response.  Unfortunately, that schematic is not correct for the tone control in my set.  If you look at the schematic for the model 90 with dual 47 tubes, the tone control is slightly different (p/n 03137).  I have the single 47 output tube with the tone control shown on the dual 47 schematic.  There are 5 wires coming out of the tone potting instead of 4.   The 3 caps may be the same, I just want to make sure. 

Thanks again for any help.  Jim