A COUPLED RESONATOR REFLEX KLYSTRON 



751 



pressions for both electronic admittance and passive circuit admittance, 

 and to establish confidence in the method of analysis proposed to predict 

 tube performance under a variety of conditions. 



Since theoretical results had been worked out for the cases of the 

 secondary Q equal to the primary Q and for the secondary Q equal to 



|Vr| and f INCREASING — *► 



(a) 



SECONDARY RESONATOR COM- 

 PLETELY DECOUPLED. HALF POWER 

 ELECTRONIC TUNING RANGE EQUAL 

 TO 49 MC. 

 (PEAK POWER = 100 MW) 



SECONDARY RESONATOR COUPLING 

 AND Q ADJUSTED FOR FLAT TOPPED 

 MODE SHAPE. BANDWIDTH FOR 

 POWER VARIATION OF ± 0.1 DB IS 

 59 MC. 



CRITICAL COUPLING, 



LOAD HYSTERESIS DUE TO OVER- 

 COUPLING, L.e.,QsK > 1 



SAME AS (d) EXCEPT FOR 

 UNIDIRECTIONAL (SAWTOOTH) 

 REPELLER SWEEP 



Fig. 16 — Qualitative verification of theory. These oscillograms were obtained 

 * with a 6BL6 in the circuit of Fig. 14 and the following operating conditions: Fo = 

 325F, Ik = 28 ma, /o = 3800 mc, 3 + ^ cycle repeller mode. 



