Hauptmann wants him to improve the efficiency and power of a directional radio transceiver he is designing. It needs to be quickly retuned to transmit on multiple frequencies, the little doctor says, and it needs to be able to measure the angle of the transmissions it receives. Can Werner manage this? He reconfigures nearly everything in the design. Some nights Hauptmann grows talkative, explaining the role of a solenoid or resistor in great detail, even classifying a spider hanging from a rafter, or enthusing about gatherings of scientists in Berlin, where practically every conversation, he
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