The Model 635 tube tester is a portable instrument providing high speed testing of T, V., Radio and Industrial types of tubes. An accessory compartment in the luggage-type carrying case holds the test cable for picture tubes and the line cord. The cable supplied in this compartment will enable you to test the standard 12 pin and the 8 pin 110° tubes. A listing of these types of picture tubes is not necessary (since an emission test is made and all tubes are tested alike)*