Voltage Dual Pentode ·Pentode-Pentode
Semiremote-cutoff twin pentode designed specifically for television intermediate-frequency amplification, providing paired controlled-gain sections for receiver IF strips.
Semiremote-cutoff twin pentode used as an IF-amplifier tube in television receivers.
Duodecar 12-contact
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.
2 physical sections, each with unique specifications.
Section 1
One representative row for two identical remote-cutoff pentodes; sheet cross-references 6AR11/11AR11 for ratings.
Section 2
Second physical pentode section; added to align rows with SectionCount.
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.
HeaterOrFilamentVoltageNominal
8.4 V
HeaterOrFilamentCurrentNominal
600 mA
PublishedCrossReference
6AR11/11AR11
Source states electrical identity except noted heater/mechanical differences
Data set 02
Published operating points and test conditions from this source.
Heater Voltage (ac/dc) 6.3 8.4
11.2 V
Published in approved 8AR11 target datasheet entry; Section1
Heater Current 0.8 0.6
450 mA
Published in approved 8AR11 target datasheet entry; Section1
Heater Warm-up Time (Average) 11
11 seconds
Published in approved 8AR11 target datasheet entry; Section1
Grid-No.3 (Suppressor-Grid) Voltage, Positive value
0 V
Published in approved 8AR11 target datasheet entry; Section1
Grid-No. 2 (Screen-Grid) Supply Voltage
330 V
Published in approved 8AR11 target datasheet entry; Section1
Grid-No. 1 (Control-Grid) Voltage, Positive-bias value
0 V
Published in approved 8AR11 target datasheet entry; Section1
Plate Dissipation
3.1 W
Published in approved 8AR11 target datasheet entry; Section1
For grid-No.2 voltages up to
165 V
Published in approved 8AR11 target datasheet entry; Section1
For grid-No.2 voltages up to 165 volts
0.65 W
Published in approved 8AR11 target datasheet entry; Section1
For grid-No.2 voltages between 165 and
330 V
Published in approved 8AR11 target datasheet entry; Section1
Plate Supply Voltage
125 V
Published in approved 8AR11 target datasheet entry; Section1
Grid No.l to Plate 0.026
0.026 pF
Published in approved 8AR11 target datasheet entry; Section1
No. 3, and Internal Shield 10
10 pF
Published in approved 8AR11 target datasheet entry; Section1
and Internal Shield 2.8
3 pF
Published in approved 8AR11 target datasheet entry; Section1
Grid No.l to Plate of Other Unit 0.002
0.002 pF
Published in approved 8AR11 target datasheet entry; Section1
Plate of Unit No.l to Plate of Unit No.2
0.02 pF
Published in approved 8AR11 target datasheet entry; Section1
Grid-No.2 Supply Voltage
125 V
Published in approved 8AR11 target datasheet entry; Section1
Cathode-Bias Resistor
56 Ω
Published in approved 8AR11 target datasheet entry; Section1
Plate Resistance (Approx.)
0.2 MΩ
Published in approved 8AR11 target datasheet entry; Section1
Transconductance
10500 µS
Published in approved 8AR11 target datasheet entry; Section1
Plate Current
11 mA
Published in approved 8AR11 target datasheet entry; Section1
Grid-No.2 Current
3.5 mA
Published in approved 8AR11 target datasheet entry; Section1
Grid-No.l Voltage (Approx.) for transconductance of
50 µS
Published in approved 8AR11 target datasheet entry; Section1