[Mondial]

I don't think there is a 128 uF, 400 V electrolytic in your radio. Looking at the schematic there is a 12 uf 400 V electrolytic at the output of the rectifier and a dual 8 and 16 uf at 400 V for additional filtering.

You can replace these caps with modern polarized electrolytics.

It is a good idea to replace the original tubular paper capacitors because even though they may test within tolerance, they are invariably leaky and will throw of the tube bias in some circuits. It is very important to replace the coupling capacitors in the audio section, especially the one between the first audio plate and the output tube grids.

These old caps also become unreliable and can open or short at any time, causing additional problems. If you are concerned about the under-chassis appearance, you can install new tubular mylar caps inside the original Philco cardboard shells.

Here is a link to the schematic:

http://www.nostalgiaair.org/Resources/417/M0013417.htm

http://www.nostalgiaair.org/Resources/416/M0013416.htm