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Voltage Radio Detector Converter ·Diode-Pentode

6BY8

Television diode-pentode combining an RF amplifier with a limiter or detector diode. Manufacturer application centers on television receiver signal processing rather than general radio detector/converter service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 600 mA

Description

Combination high-perveance diode and sharp-cutoff pentode used in television receivers; the pentode serves as an RF amplifier and the diode as a limiter or detector.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 500000 Ω
Transconductance: 0.0052 S
Max plate voltage: 300 V
Max plate dissipation: 3 W

Published promoted values applied where applicable; additional table data retained as parameters.

Section 2

Diode

X-ray radiationInterelectrode capacitances

Max plate voltage: 250 V

Published promoted values applied where applicable; additional table data retained as parameters.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate Voltage
0 V
Published operating/characteristic table
Screen Voltage
150 V
Published operating/characteristic table

Characteristic

Plate Current
10.6 mA
Published operating/characteristic table
Screen Current
4.3 mA
Published operating/characteristic table
Transconductance
200 uS
Published operating/characteristic table
Plate Resistance
1 ohm
Published operating/characteristic table

SECTION 2

Diode

Other

Plate Voltage
0 V
Published operating/characteristic table
Screen Voltage
150 V
Published operating/characteristic table

Characteristic

Plate Current
10.6 mA
Published operating/characteristic table
Screen Current
4.3 mA
Published operating/characteristic table
Transconductance
200 uS
Published operating/characteristic table
Plate Resistance
1 ohm
Published operating/characteristic table

Data set 02

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Diode capacitance
4.8 pF

Other

Maximum peak inverse plate voltage
- to 150 V
DiodeSection
Maximum peak plate current
- to 150 mA
DiodeSection

SECTION 2

Diode

Capacitance

Pentode grid1-to-plate capacitance
- to 0.0035 pF
Maximum
Pentode input capacitance
5.5 pF
Pentode output capacitance
5 pF

Other

Plate voltage
100 V
PentodeSection

Characteristic

Plate resistance
0.5 MOhm
PentodeSection
Transconductance
3900 uS
PentodeSection

Data set 03

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Voltage
6.3 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Current
600 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
and heater
4.8
Published datasheet value; multiple values represent separate source-table limits or conditions.
grid No. 2, and heater — published value 1
2
Published datasheet value; multiple values represent separate source-table limits or conditions.
grid No. 2, and heater — published value 2
5.5
Published datasheet value; multiple values represent separate source-table limits or conditions.
No.2, and heater
5
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate-Supply Voltage — published value 1
100 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate-Supply Voltage — published value 2
250 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Supply Voltage — published value 1
100 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Supply Voltage — published value 2
150 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate Resistance (Approx ) — published value 1
0.5 ohm
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate Resistance (Approx ) — published value 2
1 ohm
Published datasheet value; multiple values represent separate source-table limits or conditions.
Transconductance — published value 1
3900
Published datasheet value; multiple values represent separate source-table limits or conditions.
Transconductance — published value 2
5200
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate Current — published value 1
5 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate Current — published value 2
10.6 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
Grid-No.2 Current — published value 1
2.1 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
Grid-No.2 Current — published value 2
4.3 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
(Approx.) for plate µa = 10 — published value 1
10 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
(Approx.) for plate µa = 10 — published value 2
-4.2 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
(Approx.) for plate µa = 10 — published value 3
-6.5 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Grid No.l
5
Published datasheet value; multiple values represent separate source-table limits or conditions.
For grid-No.2 voltages between 150
150 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
and 300 volts
300 V
Published datasheet value; multiple values represent separate source-table limits or conditions.

Other

Grid No.l to plate
0.0035 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
PLATE VOLTAGE
300 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE
0 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE
300 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Negative-bias value
50 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Positive-bias value
0 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
For grid-No.2 voltages up to 150volis. 0.65 max — published value 1
150 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
For grid-No.2 voltages up to 150volis. 0.65 max — published value 2
0.65 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
PLATE DISSIPATION
3 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
Heater negative with respect to cathode
200 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Heater positive with respect to cathode
200 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
For fixed-bias operation
0.25 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
For cathode-bias operation
1 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
PEAK INVERSE PLATE VOLTAGE
430 V
Published datasheet value; multiple values represent separate source-table limits or conditions.

SECTION 2

Diode

Characteristics

Pin 1 -Pentode — published value 1
1
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 1 -Pentode — published value 2
4
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 2 -Pentode — published value 1
2
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 2 -Pentode — published value 2
6
Published datasheet value; multiple values represent separate source-table limits or conditions.
Grid No.3,
7
Published datasheet value; multiple values represent separate source-table limits or conditions.

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater Voltage (ac/dc)
6.3 V
Published in approved 6BY8 target datasheet entry; Section1
Heater Current
600 mA
Published in approved 6BY8 target datasheet entry; Section1
Heater Warm-up Time (Average)
11 seconds
Published in approved 6BY8 target datasheet entry; Section1
Plate Voltage
300 V
Published in approved 6BY8 target datasheet entry; Section1
Grid-No.3 (Suppressor-Grid) Voltage, Positive value
0 V
Published in approved 6BY8 target datasheet entry; Section1
Grid-No.2 (Screen Grid) Supply Voltage
300 V
Published in approved 6BY8 target datasheet entry; Section1
Negative-bias value
50 V
Published in approved 6BY8 target datasheet entry; Section1
Positive-bias value
0 V
Published in approved 6BY8 target datasheet entry; Section1
Plate Dissipation
3 W
Published in approved 6BY8 target datasheet entry; Section1
For grid-No.2 voltages up to
150 V
Published in approved 6BY8 target datasheet entry; Section1
For grid-No.2 voltages up to 150 volts
0.65 W
Published in approved 6BY8 target datasheet entry; Section1
For grid-No.2 voltages between 150 and
300 V
Published in approved 6BY8 target datasheet entry; Section1
For fixed-bias operation
0.25 MΩ
Published in approved 6BY8 target datasheet entry; Section1
For cathode-bias operation
1 MΩ
Published in approved 6BY8 target datasheet entry; Section1

Capacitance

Internal Shield
5.5 pF
Published in approved 6BY8 target datasheet entry; Section1
Internal Shield
5 pF
Published in approved 6BY8 target datasheet entry; Section1

Characteristic

Grid-No.2 Supply Voltage 100
150 V
Published in approved 6BY8 target datasheet entry; Section1
Cathode-Bias Resistor 150
68 Ω
Published in approved 6BY8 target datasheet entry; Section1
Plate Resistance (Approx.) 0.5
1 MΩ
Published in approved 6BY8 target datasheet entry; Section1
Transconductance 3900
5200 µS
Published in approved 6BY8 target datasheet entry; Section1
Plate Current 5
10.6 mA
Published in approved 6BY8 target datasheet entry; Section1
Grid-No.2 Current 2.1
4.3 mA
Published in approved 6BY8 target datasheet entry; Section1
10 *A —4.2
-6.5 V
Published in approved 6BY8 target datasheet entry; Section1

SECTION 2

Diode

Other

Heater Voltage (ac/dc)
6.3 V
Published in approved 6BY8 target datasheet entry; Section2
Heater Current
600 mA
Published in approved 6BY8 target datasheet entry; Section2
Heater Warm-up Time (Average)
11 seconds
Published in approved 6BY8 target datasheet entry; Section2
Plate Voltage
300 V
Published in approved 6BY8 target datasheet entry; Section2
Grid-No.3 (Suppressor-Grid) Voltage, Positive value
0 V
Published in approved 6BY8 target datasheet entry; Section2
Grid-No.2 (Screen Grid) Supply Voltage
300 V
Published in approved 6BY8 target datasheet entry; Section2
Negative-bias value
50 V
Published in approved 6BY8 target datasheet entry; Section2
Positive-bias value
0 V
Published in approved 6BY8 target datasheet entry; Section2
Plate Dissipation
3 W
Published in approved 6BY8 target datasheet entry; Section2
For grid-No.2 voltages up to
150 V
Published in approved 6BY8 target datasheet entry; Section2
For grid-No.2 voltages up to 150 volts
0.65 W
Published in approved 6BY8 target datasheet entry; Section2
For grid-No.2 voltages between 150 and
300 V
Published in approved 6BY8 target datasheet entry; Section2
For fixed-bias operation
0.25 MΩ
Published in approved 6BY8 target datasheet entry; Section2
For cathode-bias operation
1 MΩ
Published in approved 6BY8 target datasheet entry; Section2

Capacitance

Internal Shield
5.5 pF
Published in approved 6BY8 target datasheet entry; Section2
Internal Shield
5 pF
Published in approved 6BY8 target datasheet entry; Section2

Characteristic

Grid-No.2 Supply Voltage 100
150 V
Published in approved 6BY8 target datasheet entry; Section2
Cathode-Bias Resistor 150
68 Ω
Published in approved 6BY8 target datasheet entry; Section2
Plate Resistance (Approx.) 0.5
1 MΩ
Published in approved 6BY8 target datasheet entry; Section2
Transconductance 3900
5200 µS
Published in approved 6BY8 target datasheet entry; Section2
Plate Current 5
10.6 mA
Published in approved 6BY8 target datasheet entry; Section2
Grid-No.2 Current 2.1
4.3 mA
Published in approved 6BY8 target datasheet entry; Section2
10 *A —4.2
-6.5 V
Published in approved 6BY8 target datasheet entry; Section2