[jwidner]

Newbie to the phorum here...first post.

I am in the process of restoring a Philco 610B radio that was already working, but never had the caps and several other items changed from when I purchased it at a "radio" shop in New Hampshire about 10 years ago. The shop made some small repairs at the time to get it running, but no real restoration was done on it. Though I am not sure if it was this shop, but at least one item was added that was probably all that was available at the time - a .5 mf 600 volt capacitor which is in one of the photos attached.  It is not in the original schematic and I am wondering if I should include it in the restore or go with the original schematic. My electronic theory knowledge is not good enough to know why it might have been added, and any comments regarding that would be appreciated.

First, the snippet of the schematic with my notations:

   

Here is the capacitor that was put into the circuit, as best as I can tell between the cathode of the 78 tube and the bakelite containing the .1/.01 capacitors:

   

Here are two shots of where the capacitor is wired: