12-20-2018, 03:24 PM
Without any other information, other than knowing it is from a 1947 Packard, it's going to be very difficult to find a schematic. When you can get a model number off of the radio, you may be able to find a schematic based on that here:
http://www.nostalgiaair.org/Resources/303/T0000303.htm
Good luck!
http://www.nostalgiaair.org/Resources/303/T0000303.htm
Good luck!
Greg V.
West Bend, WI
Member WARCI.org