This is a four electrode trigger
tube primarily intended for use in Geiger counters.
| Nominal maintaining voltage
at 2 mA |
105V |
| Primary current |
0.4µA |
| Max. anode voltage for
no self ignition |
170V |
| Minimum anode - cathode
voltage for trigger capacitance of 120 pF |
150V |
| Maximum peak cathode current |
10mA |
| Maximum mean cathode current |
2.5mA |
| Maximum peak auxilliary
cathode current |
4mA |
| Maximum mean auxilliary
cathode current |
1mA |
| Maximum priming current
(trigger to aux. cathode) |
0.6µA |
| Minimum priming current |
0.25µA |
| Minimum charge to auxilliary
cathode to ensure triggering |
45 pC |
| Maximum speed |
400cps approx. |
