Kellogg SwitchBoard & Supply Co. 528 Get a print! $8.00 Add to Cart Product Information: Model:528 Manufacturer:Kellogg SwitchBoard & Supply Co. Schematic Pages Page 1 Page 2 Schematics Content Page 1: RADIO CIRCUIT KELLOGG SCREEN GRID RECEIVER Page 2: POWER UNIT CIRCUIT K - 50 TYPE FOR SETS 524, 525, 527, 528 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!