首页>
外国专利>
CIRCUIT ARRANGEMENT FOR THE GAIN CONTROL OF A TRANSISTOR PREAMPLIFIER BY POTENTIOMETER, FIRST OF ALL FOR CONTROLLING DYNAMIC MODULATION OF THE TAPE RECORDERS AT RECORDING
CIRCUIT ARRANGEMENT FOR THE GAIN CONTROL OF A TRANSISTOR PREAMPLIFIER BY POTENTIOMETER, FIRST OF ALL FOR CONTROLLING DYNAMIC MODULATION OF THE TAPE RECORDERS AT RECORDING