Repair of a 1930 Graybar 770 (Radiola 82)

Repair of a 1930 Graybar 770 (Radiola 82)

Just picked up this 1930 Graybar 770 Console radio. A beautiful original survivor. I had never heard of a Graybar radio before- only Graybar commercial and industrial electrical equipment. Not surprisingly, I could not find any data relevant to a Graybar 770, but...