Inner control unit for radio receiver with varactor diodes - has pushbuttons with associated tuning resistors and central tuning control which can be coupled to tuning resistor (OE 15.01.77)

摘要

The tuner has a fine-tuning resistors with associated pushbuttons for applying tuning voltages. The pushbuttons are designed as multiple-stage slider switches. A central tuning element can only be connected to at least one tuning resistor associated with it. - The voltage applied to the tuning resistor can be switched through instead of the tuning voltage of the pushbutton that has been operated. The tuning element has a mechanical coupling that engages the tuning resistor mechanism when the tuning element is displaced axially.