COLD CATHODE TUBES FOR AUDIO FRKgUENCY SIGNALS 1387 



60 

 40 

 20 





 -20 

 -40 



-100 



-140 



0.2 



0.4 



30 



XIO- 



0.6 0.8 1 2 4 6 8 10 



FREQUENCY IN CYCLES PER SECOND 



Fig. 14 — Resistive component of impedance as a function of frequency for 

 different values of cathode gap. Neon filling pressure = 50 mm of Hg. 



-20 



-40 



-60 



-80 



-100 



■120 



■160 



0.06 



0.01 0.02 0.03 0.04 0.05 



ANODE-TO-CATHODE DISTANCE IN INCHES 



Fig. 15 — Resistive component of impedance as a function of anode-to-cathode 

 distance. 



