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Voltage Pentode - Remote Cutoff (single) ·Pentode

6JH6

Semi-remote-cutoff pentode designed for gain-controlled television video-IF amplifier stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7CM
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 300 mA

Description

Semiremote-cutoff pentode used in gain-controlled television video-IF amplifier stages.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7CM
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7CM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN2K	A	K — Cathode EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN3H	—	H — Heater EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN4H	—	H — Heater EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN5P	A	P — Plate (Anode) EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN6G2	A	G2 — Screen Grid EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN7G3	A	G3 — Suppressor GridGroup 7CM7 EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM
PIN7IS	A	IS — Internal ScreenGroup 7CM7 EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CM

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 260000 Ω
Transconductance: 0.008 S
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2.3 W
Max screen dissipation: 0.55 W

Published ratings/characteristics promoted from supplied datasheet.

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
125 V
Class A1 amplifier
Screen Voltage
125 V
Class A1 amplifier

Characteristic

Plate Current
14 mA
Class A1 amplifier
Screen Current
3.6 mA
Class A1 amplifier

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
125 V
IFAmplifier
Grid 2 voltage
125 V
IFAmplifier
Cathode bias resistor
56 ohm
IFAmplifier
Plate current
14 mA
IFAmplifier
Grid 2 current
3.6 mA
IFAmplifier

Data set 03

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

,~ Voltage (AC or DC)
6.3 V
Published table value column 1
,~ Voltage (AC or DC)
0.6 V
Published table value column 2
Current at heater volts =
6.3 V
Published table value column 1
Current at heater volts =
0.3 V
Published table value column 2
respect to cathode
200 V
Published table value
Grid No.l to plate
0 pF
Published table value column 1
Grid No.l to plate
25 pF
Published table value column 2
Grid No.l to plate
0.015 pF
Published table value column 3
grid No
2 pF
Published table value column 1
grid No
2 pF
Published table value column 2
grid No
3 pF
Published table value column 3
Plate Supply Voltage
125 V
Published table value
Grid-No
2 V
Published table value column 1
Grid-No
125 V
Published table value column 2
Cathode Resistor
56 Ω
Published table value
Plate Current
14 mA
Published table value
Grid-No
2 mA
Published table value column 1
Grid-No
3.6 mA
Published table value column 2
and cathode resistor (ohms) =
0 Ω
Published table value column 1
and cathode resistor (ohms) =
-19 Ω
Published table value column 2
PLATE VOLTAGE
300 V
Published table value
GRID-No
3 V
Published table value column 1
GRID-No
0 V
Published table value column 2
GRID-No
2 V
Published table value column 1
GRID-No
300 V
Published table value column 2
between
150 V
Published table value column 1
between
300 V
Published table value column 2
PLATE DISSIPATION
2.3 W
Published table value
For cathode-bias operation
1 MΩ
Published table value
PLATE VOLTS=
125 VOLTS
Published table value
GRID —N
3 VOLTS
Published table value
GRID -N
2 VOLTS
Published table value column 1
GRID -N
125 VOLTS
Published table value column 2
PLATE VOLTS =
125 VOLTS
Published table value

Characteristics

Plate Resistance (Approx )
0.26 MΩ
Published table value
for transconductance (l.mhos) =
50 S
Published table value

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Peak Plate Current
180 mA
Published in approved 12BZ6 target entry; Section1
Heater Voltage (ac/dc) 3.15 4.2 6.3
12.6 V
Published in approved 12BZ6 target entry; Section1
Heater Current 0.6 0.45 0.3
150 mA
Published in approved 12BZ6 target entry; Section1
age)
11 seconds
Published in approved 12BZ6 target entry; Section1
Plate Voltage
330 V
Published in approved 12BZ6 target entry; Section1
Grid No.3 (Suppressor-Grid) Voltage, Positive value
0 V
Published in approved 12BZ6 target entry; Section1
Grid-No.2 (Screen-Grid) Supply Voltage
330 V
Published in approved 12BZ6 target entry; Section1
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
Published in approved 12BZ6 target entry; Section1
Plate Dissipation
2.3 W
Published in approved 12BZ6 target entry; Section1
For grid-No. 2 voltages up to
165 V
Published in approved 12BZ6 target entry; Section1
For grid-No. 2 voltages up to 165 volts
0.55 W
Published in approved 12BZ6 target entry; Section1
For grid-No.2 voltages between 165 and
330 V
Published in approved 12BZ6 target entry; Section1
For fixed-bias operation
0.25 MΩ
Published in approved 12BZ6 target entry; Section1
For cathode-bias operation
1 MΩ
Published in approved 12BZ6 target entry; Section1

Characteristic

Plate Supply Voltage
125 V
Published in approved 12BZ6 target entry; Section1
Grid-No.2 Supply Voltage
125 V
Published in approved 12BZ6 target entry; Section1
Cathode-Bias Resistor
56 Ω
Published in approved 12BZ6 target entry; Section1
Plate Resistance (Approx.)
0.26 MΩ
Published in approved 12BZ6 target entry; Section1
Grid-No.l Voltage (Approx.) for transconductance of
50 µS
Published in approved 12BZ6 target entry; Section1
Grid-No.l Voltage (Approx.) for transconductance of 50 /imhos
-3.6 V
Published in approved 12BZ6 target entry; Section1
Grid-No.l Voltage (Approx.) for transconductance of
700 µS
Published in approved 12BZ6 target entry; Section1
Heater Voltage (ac/dc)
6.3 V
Published in approved 12BZ6 target entry; Section1
Heater Current
150 mA
Published in approved 12BZ6 target entry; Section1