Have you checked Philco 32 here on nostalgiaair. It's a 32 volt farm radio.
http://ww3.nostalgiaair.org/schematics/PHL/_PHL_5-19.gif
121 is a run number. Philco usually started with 121 and used 123 etc for revisions.
Notice Rider page 5-19 has a schematic. Change this number to 5-17, 5-18 etc. There are other pages about your radio. Wait 30 seconds between selections.
Norm
:Also some schematics would be nice. Again it has a metal tag riveted on
:> the back of the chassis stating Chassis 32A, code 121. The guy I
:> bought it from still has it on his web page here -
:> http://www.radiorecycler.com/show.html
:>
:> I am appreciative in advance for your time in helping me figure
:> this out. Thanks
: