Radio broadcast .. (1922-30)

Record Details:

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I RADIO BROADCAST An Experimental Screen-Grid Tuner Converting Receivers for AC* Operation HowtoBuild a Short"\VaveTelephoneTransmitter ANon"Motorboatin0 Resistance"Coupled Amplifier A New Rectifier Tube for B'Supply Units How Phonograph Records Are Made 7 £" JJ i T>oran & Company, Garden City. WewUork