Specialized - Switching Tube ·CounterSelectorSwitch
Cold-cathode decimal counting/selector tube using pulsed guide electrodes to advance the discharge among output cathodes.
Cold-cathode decimal counting/selector tube with output cathodes and pulsed guide electrodes.
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
350 V
Maximum Cathode Current
0.5 mA
InputFrequencyMaximum
5000 Hz
TypicalDCSupplyVoltage
425 V
NominalTubeDrop
195 V
Data set 02
Published operating points and test conditions from this source.
Anode supply voltage maximum
800 V
Data set 03
Published operating points and test conditions from this source.
Anode supply voltage minimum
350 V
Anode supply voltage maximum
800 V
Anode current
0.6 mA
Pulse repetition maximum
4 kpps
Pulse
Typical anode supply voltage
350 V
Nominal tube drop
187 V
Guide bias minimum
35 V
Square pulse drive amplitude minimum
-75 V
Pulse
Square double-pulse width minimum
60 us
Pulse
Forced reset pulse amplitude minimum
-120 V
Pulse
Forced reset pulse width minimum
50 us
Pulse
Cathode load resistance maximum
150 kohm
Transfer voltage
140 V
Application
Decimal pulse counter / selector