TRAVELING WAVE TUBE FOR 6,000-MC RADIO RELAY 1327 



70 



65 



60 



55 



50 



45 



IT) 



25 



20 



10 



0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 



r/3-(MA)'/^ 



Fig. 32 — Measured and calculated low-level gain as a function of the one-third 

 power of beam current. The parameter b/a is the ratio of effective beam diameter 

 to mean helix diameter. 



40.0 



37.5 



35.0 



32.5 



Q 30.0 



Z 27.5 

 < 



25.0 



22.5 



20.0 



4.5 



5.0 5.5 6.0 6.5 7.0 7.5 



FREQUENCY IN KILOMEGACYCLES PER SECOND 



8.0 



Fig. 33 — Measured and calculated frequency response for a current of 40 ma. 



