[Pdouglaski]

Arran,
Thanks for digging into your radio library. The Studebaker radio model is AC-2687/S5524. It has a power/ speaker chassis (S5523)with 6AQ5 tube and 6X4 rectifier. I have recapped that chassis, new carbon resistors, replaced the two section electrolytic capacitor with two new caps and the vibrator works OK. I ohmed the windings on the vibrator transformer and the primary is good but one side of the center tapped secondary is open.
The radio control chassis has a 6BA5 RF amp, 6BE6 converter, 6BA6 IF amp, 6AV6 Det. AVC +1st audio amp tube. I haven't done anything in the radio control chassis yet. I need to get the vibrator transformer replaced first. I'll check ebay and elsewhere for similar Philco car radios that ran on 6v pos. ground current. Also, I'll see if I can find Hammond on the internet. More later....thanks for your tips.
Phil