Thordarson Electric Mfg. Co. 250 Power Amp Get a print! $8.00 Add to Cart Product Information: Model:250 Power Amp Manufacturer:Thordarson Electric Mfg. Co. Schematic Pages Page 1 Schematics Content Page 1: 250 TWO - STAGE POWER AMPLIFIER AND PLATE SUPPLY 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!