Republic Industries TR-5B Get a print! $8.00 Add to Cart Product Information: Model:TR-5B Manufacturer:Republic Industries Schematic Pages Page 1 Schematics Content Page 1: 42 Grid to Cathode 11. Speaker Field Voltage 50 volts. 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!