Title : 
The Four-Electrode Vacuum Tube as Beat-Frequency Oscillator
         
        
            Author : 
Warren, S. Reid, Jr.
         
        
            Author_Institution : 
Moore School of Electrical Engineering, University of Pennsylvania, Philadelphia, Penna.
         
        
        
        
        
            fDate : 
3/1/1930 12:00:00 AM
         
        
        
        
            Abstract : 
This paper describes briefly the use of one UX-222 four-electrode vacuum tube as a double oscillator and detector. Audio-frequency output is obtained in the beat note between the fundamental of the oscillation due to one grid and the second harmonic of that due to the other, giving a beat-frequency oscillator.
         
        
            Keywords : 
Coupling circuits; Detectors; Electron tubes; Frequency modulation; Laboratories; Oscillators; Radiofrequency amplifiers; Testing;
         
        
        
            Journal_Title : 
Radio Engineers, Proceedings of the Institute of
         
        
        
        
        
            DOI : 
10.1109/JRPROC.1930.222030