Charles Hoodwin Co. 4 Tube DC Get a print! $8.00 Add to Cart Product Information: Model:4 Tube DC Manufacturer:Charles Hoodwin Co. (Aero Products) Schematic Pages Page 1 Schematics Content Page 1: 6 - Tube D - C. Superheterodyne IF PEAK 175 KC 4 - Tube D - C. 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!