Specialized - Switching Tube ·CounterSelectorSwitch
Top-view cold-cathode decimal counter tube with cathodes zero through nine individually available as outputs for counting and selection.
Top-view cold-cathode decimal counter tube with cathodes 0 through 9 brought to individual outputs.
Modified Duodecal 13-contact counting-tube base family
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G3 | A | G3 — Suppressor GridGroup 6AR1 Original EIA label G3; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN1IS | A | IS — Internal ScreenGroup 6AR1 Original EIA label IS; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN1F | — | F — FilamentGroup 6AR1 Original EIA label F; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN2P | A | P — Plate (Anode) Original EIA label P; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN3G2 | A | G2 — Screen Grid Original EIA label G2; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN4IC | — | IC Original EIA label IC; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN5G3 | A | G3 — Suppressor GridGroup 6AR5 Original EIA label G3; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN5IS | A | IS — Internal ScreenGroup 6AR5 Original EIA label IS; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN5F | — | F — FilamentGroup 6AR5 Original EIA label F; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN6G1 | A | G1 — Control Grid Original EIA label G1; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
| PIN7F | — | F — Filament Original EIA label F; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 127, 6AR |
1 physical section, each with unique specifications.
Section 1
No fixed ratings are recorded for this section.
Published maximum ratings, representative operating conditions, and available capacitance/rectifier data reviewed.
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.
Maximum plate voltage
90 V
Published handbook rating
Maximum screen voltage
90 V
Published handbook rating
Plate voltage
90 V
ClassA
Screen voltage
90 V
ClassA
Control-grid bias
0 V
ClassA
Plate current
1.6 mA
ClassA
Screen current
0.45 mA
ClassA
Plate resistance
1500000 ohm
Published handbook characteristic
Transconductance
900 µS
Published handbook characteristic
Heater/filament voltage
1.4 V
Published heater/filament rating
Heater/filament current
50 mA
Published heater/filament rating
Input capacitance
3.6 pF
Published capacitance column
Output capacitance
7.3 pF
Published capacitance column
Grid-to-plate capacitance
0.008 pF
Published capacitance column
Data set 04
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