[jrblasde]

Thanks for pointing out that shield! I will try to find out where else it may belong. I simply installed it back where it once was when I bought the radio. There is a metal bracket which slips over a pin on the underside of the tube and then comes out and up the side wall of the tube. Additionally, there’s a metal brad between one of the socket rivets and the chassis. I installed a fresh rivet when reinstalling the tube socket. I figured that the shield must connect the two contacts.

Let me looks for some photos online of other 46-480’s to compare.