TUNER BOW- 



FLEXIBLE 

 DIAPHRAGM 



TUNER SCREW 



RESONATOR 



COUPLING LOOP 



-REPELLER 



GRIDS 



CATHODE SPIKE 



CATHODE 



_CATHODE 

 i HEATER 



BEAM -FORMING 

 ELECTRODE 



_ TUNER 

 BACK STRUT 



Fig. 64. — Section view of the W.E. 2K29 reflex oscillator shows the electron optical 

 system used in eliminating hysteresis. (Fig. 65) This tube has an internal cavity and is 

 designed for the frequency range from 3400 to 3960 mc/s. 



565 



