TRAVELING WAVE TUBE FOR 6,000-MC RADIO RELAY 1331 



500 550 600 650 700 



MAGNETIC FLUX DENSITY IN GAUSS 



750 



Fig. 37 — Maximum power output after fading, voltage for maximum output, 

 and helix interception at maximum output as functions of magnetic flux density. 

 These measurements were made using magnetic circuits charged to different 

 strengths. Helix interception above about one per cent is undesirable if long tube 

 life is required. 



