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Voltage Dual Triode Pentode ·Pentode-Triode-Triode

6BD11

Compactron combining high-mu and medium-mu triodes with a sharp-cutoff pentode for television and general-purpose signal-amplifier circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: 12DP
Socket code: B12C
Base pins: 12
Nominal heater: 6.3 V / 1.05 A

Description

Dual triode with high-mu and medium-mu units plus a sharp-cutoff pentode. The supplied datasheet was read for heater data, maximum ratings, operating characteristics, and interelectrode capacitances where published.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12DP
Socket code: B12C
Base pins: 12
Nominal heater voltage: 6.3 V
Nominal heater current: 1.05 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12DP - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

3 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 12400 Ω
Transconductance: 0.0055 S
Amplification factor: 68
Max plate voltage: 330 V
Max plate dissipation: 1.5 W

High-mu triode, source Section 1.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 9400 Ω
Transconductance: 0.0044 S
Amplification factor: 41
Max plate voltage: 330 V
Max plate dissipation: 2 W

Medium-mu triode, source Section 2.

Section 3

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 45000 Ω
Transconductance: 0.0104 S
Max plate voltage: 330 V
Max plate dissipation: 4 W
Max screen dissipation: 1.1 W

Pentode section; ratings and characteristics retained in parameter rows where not safely promotable.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Plate Voltage
200 V
Grid Voltage
-2 V
Plate Current
7 mA
GridVoltageAtPlateCurrent100uA
-5.5 V

Capacitance

Grid To Plate Capacitance
1.9 pF
Input Capacitance
3 pF
Output Capacitance
2.2 pF

SECTION 2

Triode

Characteristic

Plate Voltage
200 V
Cathode Bias Resistance
220 ohm
Plate Current
9.2 mA
GridVoltageAtPlateCurrent100uA
-6.5 V

Capacitance

Grid To Plate Capacitance
3.6 pF
Input Capacitance
2.4 pF
Output Capacitance
3.8 pF

SECTION 3

Pentode

Other

Screen Supply Voltage
330 V
HeaterCathodePositiveDC
100 V
HeaterCathodeTotalDCPeak
200 V
Plate Voltage
35 V
Pentode; PlateVoltage=35V; ScreenVoltage=135V
Screen Voltage
135 V
Pentode; PlateVoltage=35V; ScreenVoltage=135V
Grid1 Voltage
0 V
Pentode; PlateVoltage=35V; ScreenVoltage=135V
Plate Voltage
135 V
Pentode; PlateVoltage=135V; ScreenVoltage=135V
Screen Voltage
135 V
Pentode; PlateVoltage=135V; ScreenVoltage=135V
Cathode Bias Resistance
100 ohm
Pentode; PlateVoltage=135V; ScreenVoltage=135V

Characteristic

Plate Current
34 mA
Pentode; PlateVoltage=35V; ScreenVoltage=135V
Screen Current
13 mA
Pentode; PlateVoltage=35V; ScreenVoltage=135V
Plate Current
17 mA
Pentode; PlateVoltage=135V; ScreenVoltage=135V
Screen Current
4 mA
Pentode; PlateVoltage=135V; ScreenVoltage=135V

Capacitance

Grid1 To Plate Capacitance
0.13 pF
Input Capacitance
11 pF
Output Capacitance
4.6 pF

Data set 02

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Voltage (AC or DC) ±
3 V
Section1;PublishedColumn1
Voltage (AC or DC) ±
0.6 V
Section1;PublishedColumn2
Current at
6.3 V
Section1
Peak
200 V
Section1
DC component
100 V
Section1
Plate Supply Voltage
200 V
Section1;PublishedColumn1
Grid Voltage
-2 V
Section1
Cathode Resistor
220 ohm
Section1
Plate Resistance (Approx.)
12400 ohm
Section1;PublishedColumn1
Plate Resistance (Approx.)
9400 ohm
Section1;PublishedColumn2
Transconductance
5500 µS
Section1;PublishedColumn1
Transconductance
4400 µS
Section1;PublishedColumn2
Plate Current
7 mA
Section1;PublishedColumn1
Plate Current
9.2 mA
Section1;PublishedColumn2
Grid Voltage for plate µa =
-5.5 V
Section1;PublishedColumn1
Grid Voltage for plate µa =
-6.5 V
Section1;PublishedColumn2
Plate Supply Voltage
35 V
Section1;PublishedColumn1
Plate Supply Voltage
135 V
Section1;PublishedColumn2
Grid-No. Supply Voltage
135 V
Section1;PublishedColumn1
Cathode Resistor
100 ohm
Section1
Plate Resistance (Approx.)
45000 ohm
Section1
Transconductance
10400 µS
Section1
Plate Current b
34 mA
Section1;PublishedColumn1
Plate Current b
17 mA
Section1;PublishedColumn2
► Grid-No. Currerit b
13 mA
Section1;PublishedColumn1
► Grid-No. Currerit b
4 mA
Section1;PublishedColumn2

Capacitance

Grid to plate
1.9 pF
Section1
Input: GT to ( KTL KT + IS, Kp+G p +'I S, H)
3 pF
Section1;PublishedColumn1
Output: PTl to (KTl KT + IS, Kp+G p+ IS, H)
3 pF
Section1;PublishedColumn1
Output: PTl to (KTl KT + IS, Kp+G p+ IS, H)
2.2 pF
Section1;PublishedColumn2
Grid to plate
3.6 pF
Section1
Input: GT to (KT + IS, Kp+G p+ IS, H)
3 pF
Section1;PublishedColumn1
Input: GT to (KT + IS, Kp+G p+ IS, H)
2.4 pF
Section1;PublishedColumn2
Output: PT to (K + IS, Kp+G p+ IS, H)
3 pF
Section1;PublishedColumn1
Output: PT to (K + IS, Kp+G p+ IS, H)
3.8 pF
Section1;PublishedColumn2
Grid No. to plate
1 pF
Section1;PublishedColumn1
Grid No. to plate
0.13 pF
Section1;PublishedColumn2
Input: G pto(KT +IS, Kp+G p+IS, G p, H)
2 pF
Section1;PublishedColumn1
Input: G pto(KT +IS, Kp+G p+IS, G p, H)
11 pF
Section1;PublishedColumn2
Output: Pp to (KT + IS, Kp+G p+ IS, G p, H)
2 pF
Section1;PublishedColumn1
Output: Pp to (KT + IS, Kp+G p+ IS, G p, H)
4.6 pF
Section1;PublishedColumn2
PentodeplatetoplateofiriodeNo max
2 pF
Section1;PublishedColumn1
PentodeplatetoplateofiriodeNo max
0.045 pF
Section1;PublishedColumn2
PlateoftriodeNo.ltoplateoftriodeNo. . max,
2 pF
Section1;PublishedColumn1
PlateoftriodeNo.ltoplateoftriodeNo. . max,
0.075 pF
Section1;PublishedColumn2

SECTION 2

Triode

Characteristics

Voltage (AC or DC) ±
3 V
Section2;PublishedColumn1
Voltage (AC or DC) ±
0.6 V
Section2;PublishedColumn2
Current at
6.3 V
Section2
Peak
200 V
Section2
DC component
100 V
Section2
Plate Supply Voltage
200 V
Section2;PublishedColumn1
Grid Voltage
-2 V
Section2
Cathode Resistor
220 ohm
Section2
Plate Resistance (Approx.)
12400 ohm
Section2;PublishedColumn1
Plate Resistance (Approx.)
9400 ohm
Section2;PublishedColumn2
Transconductance
5500 µS
Section2;PublishedColumn1
Transconductance
4400 µS
Section2;PublishedColumn2
Plate Current
7 mA
Section2;PublishedColumn1
Plate Current
9.2 mA
Section2;PublishedColumn2
Grid Voltage for plate µa =
-5.5 V
Section2;PublishedColumn1
Grid Voltage for plate µa =
-6.5 V
Section2;PublishedColumn2
Plate Supply Voltage
35 V
Section2;PublishedColumn1
Plate Supply Voltage
135 V
Section2;PublishedColumn2
Grid-No. Supply Voltage
135 V
Section2;PublishedColumn1
Cathode Resistor
100 ohm
Section2
Plate Resistance (Approx.)
45000 ohm
Section2
Transconductance
10400 µS
Section2
Plate Current b
34 mA
Section2;PublishedColumn1
Plate Current b
17 mA
Section2;PublishedColumn2
► Grid-No. Currerit b
13 mA
Section2;PublishedColumn1
► Grid-No. Currerit b
4 mA
Section2;PublishedColumn2

Capacitance

Grid to plate
1.9 pF
Section2
Input: GT to ( KTL KT + IS, Kp+G p +'I S, H)
3 pF
Section2;PublishedColumn1
Output: PTl to (KTl KT + IS, Kp+G p+ IS, H)
3 pF
Section2;PublishedColumn1
Output: PTl to (KTl KT + IS, Kp+G p+ IS, H)
2.2 pF
Section2;PublishedColumn2
Grid to plate
3.6 pF
Section2
Input: GT to (KT + IS, Kp+G p+ IS, H)
3 pF
Section2;PublishedColumn1
Input: GT to (KT + IS, Kp+G p+ IS, H)
2.4 pF
Section2;PublishedColumn2
Output: PT to (K + IS, Kp+G p+ IS, H)
3 pF
Section2;PublishedColumn1
Output: PT to (K + IS, Kp+G p+ IS, H)
3.8 pF
Section2;PublishedColumn2
Grid No. to plate
1 pF
Section2;PublishedColumn1
Grid No. to plate
0.13 pF
Section2;PublishedColumn2
Input: G pto(KT +IS, Kp+G p+IS, G p, H)
2 pF
Section2;PublishedColumn1
Input: G pto(KT +IS, Kp+G p+IS, G p, H)
11 pF
Section2;PublishedColumn2
Output: Pp to (KT + IS, Kp+G p+ IS, G p, H)
2 pF
Section2;PublishedColumn1
Output: Pp to (KT + IS, Kp+G p+ IS, G p, H)
4.6 pF
Section2;PublishedColumn2
PentodeplatetoplateofiriodeNo max
2 pF
Section2;PublishedColumn1
PentodeplatetoplateofiriodeNo max
0.045 pF
Section2;PublishedColumn2
PlateoftriodeNo.ltoplateoftriodeNo. . max,
2 pF
Section2;PublishedColumn1
PlateoftriodeNo.ltoplateoftriodeNo. . max,
0.075 pF
Section2;PublishedColumn2

SECTION 3

Pentode

Characteristics

Voltage (AC or DC) ±
3 V
Section3;PublishedColumn1
Voltage (AC or DC) ±
0.6 V
Section3;PublishedColumn2
Current at
6.3 V
Section3
Peak
200 V
Section3
DC component
100 V
Section3
Plate Supply Voltage
200 V
Section3;PublishedColumn1
Grid Voltage
-2 V
Section3
Cathode Resistor
220 ohm
Section3
Plate Resistance (Approx.)
12400 ohm
Section3;PublishedColumn1
Plate Resistance (Approx.)
9400 ohm
Section3;PublishedColumn2
Transconductance
5500 µS
Section3;PublishedColumn1
Transconductance
4400 µS
Section3;PublishedColumn2
Plate Current
7 mA
Section3;PublishedColumn1
Plate Current
9.2 mA
Section3;PublishedColumn2
Grid Voltage for plate µa =
-5.5 V
Section3;PublishedColumn1
Grid Voltage for plate µa =
-6.5 V
Section3;PublishedColumn2
Plate Supply Voltage
35 V
Section3;PublishedColumn1
Plate Supply Voltage
135 V
Section3;PublishedColumn2
Grid-No. Supply Voltage
135 V
Section3;PublishedColumn1
Cathode Resistor
100 ohm
Section3
Plate Resistance (Approx.)
45000 ohm
Section3
Transconductance
10400 µS
Section3
Plate Current b
34 mA
Section3;PublishedColumn1
Plate Current b
17 mA
Section3;PublishedColumn2
► Grid-No. Currerit b
13 mA
Section3;PublishedColumn1
► Grid-No. Currerit b
4 mA
Section3;PublishedColumn2

Capacitance

Grid to plate
1.9 pF
Section3
Input: GT to ( KTL KT + IS, Kp+G p +'I S, H)
3 pF
Section3;PublishedColumn1
Output: PTl to (KTl KT + IS, Kp+G p+ IS, H)
3 pF
Section3;PublishedColumn1
Output: PTl to (KTl KT + IS, Kp+G p+ IS, H)
2.2 pF
Section3;PublishedColumn2
Grid to plate
3.6 pF
Section3
Input: GT to (KT + IS, Kp+G p+ IS, H)
3 pF
Section3;PublishedColumn1
Input: GT to (KT + IS, Kp+G p+ IS, H)
2.4 pF
Section3;PublishedColumn2
Output: PT to (K + IS, Kp+G p+ IS, H)
3 pF
Section3;PublishedColumn1
Output: PT to (K + IS, Kp+G p+ IS, H)
3.8 pF
Section3;PublishedColumn2
Grid No. to plate
1 pF
Section3;PublishedColumn1
Grid No. to plate
0.13 pF
Section3;PublishedColumn2
Input: G pto(KT +IS, Kp+G p+IS, G p, H)
2 pF
Section3;PublishedColumn1
Input: G pto(KT +IS, Kp+G p+IS, G p, H)
11 pF
Section3;PublishedColumn2
Output: Pp to (KT + IS, Kp+G p+ IS, G p, H)
2 pF
Section3;PublishedColumn1
Output: Pp to (KT + IS, Kp+G p+ IS, G p, H)
4.6 pF
Section3;PublishedColumn2
PentodeplatetoplateofiriodeNo max
2 pF
Section3;PublishedColumn1
PentodeplatetoplateofiriodeNo max
0.045 pF
Section3;PublishedColumn2
PlateoftriodeNo.ltoplateoftriodeNo. . max,
2 pF
Section3;PublishedColumn1
PlateoftriodeNo.ltoplateoftriodeNo. . max,
0.075 pF
Section3;PublishedColumn2