Hickok Elect. Instrument Co. 4600 Tester Get a print! $8.00 Add to Cart Product Information: Model:4600 Tester Manufacturer:Hickok Elect. Instrument Co. Schematic Pages Page 1 Schematics Content Page 1: Model 48 Volt - Ohm Hotar Model 4600 Tester Model 4700 Tostor 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!