Kellogg SwitchBoard & Supply Co. 523 Get a print! $8.00 Add to Cart Product Information: Model:523 Manufacturer:Kellogg SwitchBoard & Supply Co. Schematic Pages Page 1 Schematics Content Page 1: RADIO CIRCUIT KELLOGG SCREEN GRID RECEIVER Please note: we carry a wide range of products which will fulfill the specifications above. Please use our search function or browse our products to find what you need!