By varying the turns ratio, the impedance of the antenna could be matched to the impedance of the receiver, to transfer maximum RF power to the receiver, vitally important to achieve adequate receiving range in the unamplified receivers of this era.
The impedance of the antenna was varying the turns ratio. The impedance of the antenna could be matched to the impedance of the receiver. This was to transfer maximum RF power to the receiver, vitally important to achieve adequate receiving range in the unamplified receivers of this era. One was this.