Thordarson Electric Mfg. Co. PP 171 Get a print! $8.00 Add to Cart Product Information: Model:PP 171 Manufacturer:Thordarson Electric Mfg. Co. Schematic Pages Page 1 Schematics Content Page 1: PUSH - PULL 171 AMPLIFIER 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!