de luxe` transistor tester

Like the previous circuit, this transis-tor tester will indicate whether the current gain of the transistor under test is that of a class `A`-, class `B`-or class `C` type. The circuit wil I also determine whether or not the transis-tor is defective. The advantage of this design, however, is that the class of transistor is automatically deter-mined and shown directly on a seven-segment display.