INTRODUCTION TO THE AVO TRANSISTOR ANALYSER The rapid increase in the use of transistors in electronic equipment, has resulted in the need for a versatile and comprehensive instrument capable of measuring the basic characteristics of a transistor. The instrument should also be capable of assisting the designer in determining whether any given transistor is suitable for a particular application. With these ideas in mind the “AVO” Transistor Analyser has been introduced. This instrument which is portable, and battery operated, is capable of measuring the more generally useful transistor parameters. The instrument will normally be used in conjunction with the “AVO” International Transistor Data Manual which contains test data for approximately 3,000 transistors (both obsolete and current types), and enables I'co, ß or ß and noise measurements to be made without the necessity to consult manufacturers data. This publication includes maximum ratings and a diagram of transistor terminations, thus reducing the possibility of damage due to overloads, or incorrect connections. The products of more than sixty manufacturers are listed, providing a useful guide to the selection of a suitable transistor for any given application, also included is test*data for service type transistors, together with service equivalents of commercial products.