Transistorized Horizontal Output Stage

Performance of a transistorized horizontal output deflection circuit has been described. Different methods of controlling linearity as well as methods to provide transistor arc protection have been investigated and described with some of their advantages and disadvantages. A brief description of a horizontal output deflection coil has been given. Also, a general horizontal output transformer design, and some calculations based on core material, cross section shape, and coil losses, have been discussed. In short, a high performance, line operated, all transistor, horizontal output stage for a color system at 1.2 ma. and 23kv, with 140 volts B-supply, has been achieved with existing devices and yielded a performance, if not better, at least equal to the one accomplished with tubes, at a competitive cost. Life test data has not been completed, but it is believed that proper design will result in high reliability even though transistors are more susceptible to accidental failure and corona arcing than tubes.