Specialized - Switching Tube ·CounterSelectorSwitch
Cold-cathode decimal counting and selector tube that advances a glow discharge among numbered cathodes in response to guide-electrode pulses.
Cold-cathode decimal counting/selector tube rated for high pulse repetition.
International Octal
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Published maximum ratings and typical characteristics promoted from the approved source; identical repeated sections compressed where applicable.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Maximum Plate Voltage
400 V
Maximum Cathode Current
1.2 mA
InputFrequencyMaximum
100000 Hz
TypicalDCSupplyVoltage
450 V
NominalTubeDrop
235 V
Data set 02
Published operating points and test conditions from this source.
Anode supply voltage maximum
800 V
Input frequency maximum
100 kpps
Data set 03
Published operating points and test conditions from this source.
Anode supply voltage minimum
400 V
Anode supply voltage maximum
800 V
Anode current
0.8 mA
Pulse repetition maximum
100 kpps
Pulse
Typical anode supply voltage
400 V
Nominal tube drop
235 V
Guide bias minimum
45 V
Square pulse drive amplitude minimum
-85 V
Pulse
Square double-pulse width minimum
4 us
Pulse
Forced reset pulse amplitude minimum
-120 V
Pulse
Forced reset pulse width minimum
4 us
Pulse
Cathode load resistance maximum
50 kohm
Transfer voltage
140 V
Application
Decimal pulse counter / selector