Transistor amplifier

Claim 1

A QUALITY AUDIO AMPLIFIER ADAPTED FOR MANIATURIZATION WITH A MINIMUM NUMBER OF COMPONENTS, COMPRISING A B-LINE, A GROUP LINE, AND A BATTERY HAVING FINITE IMPEDANCE AND HAVING ITS TERMINALS RESPECTIVELY CONNECTED TO SAID LINES; A FIRST STAGE PNP TRANSISTOR WITH ITS EMITTER CONNECTED DIRECTLY TO GROUP; ITS COLLECTOR CONNECTED THROUGH A LOAD RESISTOR TO THE B-LINE; AND ITS BASE CONNECTED IN SERIES THROUGH AN INPUT COIL, A FIRST JUNCTION POINT AND A SIGNAL GROUPING CONDENSER TO THE GROUND LINE; A SECOND STAGE PNP TRANSISTOR ITS BASE CONNECTED DIRECTLY TO THE COLLECTOR OF THE FIRST STAGE TRANSISTOR; ITS COLLECTOR CONNECTED THROUGH A GAIN CONTROL POTENTIOMETER TO THE B-LINE; AND WITH ITS EMITTER CONNECTED THROUGH A FIRST BIASING RESISTOR TO THE GROUND LINE AND WITH ITS EMITTER ALSO CONNECTED THROUGH A RESISTOR TO SAIR FIRST JUNCTION POINT TO FEED BACK D.C. COMPENSATING BIAS TO SAID FIRST STAGE TRANSISTOR TO COMPENSATE FOR THE VARYING EFFECTS OF TEMPERATURE CHANGES ON SAID PNP TRANSISTORS; AND AN OUTPUT STAGE NPN TRANSISTOR WITH ITS BASE CONNECTED THROUGH A COUPLING CONDENSER TO THE WIPER OF THE GAIN CONTROL POTENTIOMETER AND WITH ITS BASE ALSO CONNECTED THROUGH A BIAS RESISTOR TO THE COLLECTOR OF THE NPN TRANSISTOR; WITH ITS COLLECTOR CONNECTED THROUGH AN OUTPUT COIL TO THE GROUP LINE; AND WITH ITS EMITTER CONNECTED DIRECT TO THE B-LINE; WHEREBY TO ACHIEVE HIGH GAIN AND GAIN CONTROL OVER A WIDE RANGE AT LOW COLLECTOR CURRENTS AND WITH LOW DISTORTION WHILE MAINTAINING A WIDE TEMPERATURE RANGE THROUGH THE PROVISION OF D.C. COMPEN SATING BIAS.