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Voltage - Triode (single high frequency) ·Triode

2FH5

High-mu miniature triode used as an RF amplifier in VHF color and black-and-white television tuners.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7FP
Socket code: B7G
Base pins: 7
Nominal heater: 2.35 V / 600 mA

Description

High-mu miniature triode used as an RF amplifier in VHF color and black-and-white television tuners.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7FP
Socket code: B7G
Base pins: 7
Nominal heater voltage: 2.35 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7FP - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1K	A	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7FP
PIN2G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7FP
PIN3H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7FP
PIN4H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7FP
PIN5P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7FP
PIN6IS	A	IS — Internal Screen EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7FP
PIN7K	A	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7FP

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5600 Ω
Transconductance: 0.009 S
Amplification factor: 50
Max plate voltage: 150 V
Max plate dissipation: 2.2 W
Max cathode current: 22 mA
Rectifier max heater-cathode voltage: 100 V
Rectifier warm-up time: 11 s

Published promoted fields populated from Maximum Ratings / Characteristics / Typical Operation headings.

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

Triode

Capacitance

Grid To Plate Capacitance
0.52 pF
Maximum
Input Capacitance
3.2 pF
Output Capacitance
4 pF
WithShield

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
135 V
Grid voltage
-1 V
Plate current
11 mA

Characteristics

Plate resistance
5600 Ohm
Transconductance
9000 uS
Amplification factor
50 ratio
Control-grid cutoff voltage
-5.5 V

Data set 03

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Voltage
2.35 V
Heater Current
600 mA
ControlledWarmupHeater
1 boolean
Heater Warmup Time
11 s
Plate Voltage
135 V
Grid Voltage
-1 V
Plate Current
11 mA
Plate Resistance
5600 ohm
Transconductance
9000 uS
Amplification Factor
50
GridCutoffBias
-5.5 V
Grid To Plate Capacitance
0.6 pF
Input Capacitance
3.2 pF
Output Capacitance
4 pF

Other

HeaterCathodeVoltageMaximum
100 V

Data set 04

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

GRID TO PLATE: G TO P (MAX.) (FOGEY) -►
0.52 pF
Capacitances | GRID TO PLATE: G TO P (MAX.) (FOGEY) -► 0.52 -i 0.52 pf

Other

HEATER VOLTAGE
2.35 V
Maximum Ratings | HEATER VOLTAGE 2.35 VOLTS
MAXIMUM PLATE VOLTAGE
150 V
Maximum Ratings | MAXIMUM PLATE VOLTAGE 150 VOLTS
MAXIMUM GRID VOLTAGE (POSITIVE
0 V
Maximum Ratings | MAXIMUM GRID VOLTAGE (POSITIVE 1 0 VOLT
MAXIMUM PLATE DISSIPATION
2.2 W
Maximum Ratings | MAXIMUM PLATE DISSIPATION 2.2 WATTS
MAXIMUM DC CATHODE CURRENT
22 mA
Maximum Ratings | MAXIMUM DC CATHODE CURRENT 22 MA.
n MAXIMUM GRID CIRCUIT RESISTANCE
0 Mohm
Maximum Ratings | n MAXIMUM GRID CIRCUIT RESISTANCE 1 .0 MEGOHM
HEATER NEGATIVE WITH RESPECT TO CATHODE
100 V
Maximum Ratings | HEATER NEGATIVE WITH RESPECT TO CATHODE 100 VOLTS
HEATER POSITIVE WITH RESPECT TO CATHODE
100 V
Maximum Ratings | HEATER POSITIVE WITH RESPECT TO CATHODE 100 VOLTS
HEATER WARM-UP TIME (APPROX.)*
11 s
Maximum Ratings | HEATER WARM-UP TIME (APPROX.)* 11.0 SECONDS
HEATER VOLTAGE
2.35 V
Typical Operating Conditions | HEATER VOLTAGE 2.35 VOLTS
PLATE VOLTAGE
135 V
Typical Operating Conditions | PLATE VOLTAGE 135 VOLTS
GRID VOLTAGE
1 V
Typical Operating Conditions | GRID VOLTAGE - 1.0 VOLT
PLATE RESISTANCE (APPROX.)
5600 ohm
Typical Operating Conditions | PLATE RESISTANCE (APPROX.) 5600 OHMS
TRANSCONDUCTANCE
9000 ΜMHOS
Typical Operating Conditions | TRANSCONDUCTANCE 9000 µMHOS
PLATE CURRENT
11 mA
Typical Operating Conditions | PLATE CURRENT 11 MA.
GRID VOLTAGE (A PP ROX.) FOR
5.5 V
Typical Operating Conditions | GRID VOLTAGE (A PP ROX.) FOR 100 µA PLATE CURRENT - 5.5 VOLTS

Data set 05

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
2.35 V
Heater current
600 mA
Heater warm-up time
11 s
Plate voltage
135 V
ClassA
Plate current
10 mA
ClassA

Characteristic

Transconductance
9000 uS
ClassA
Amplification factor
45
ClassA
Plate resistance
5000 ohm
ClassA

Application

Application
VHF grounded-grid amplifier

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Voltage (ac/dc) 2.35
6.3 V
Published in approved 6FH5 target entry; Section1
Heater Current
200 mA
Published in approved 6FH5 target entry; Section1
Plate Voltage
150 V
Published in approved 6FH5 target entry; Section1
Grid Voltage, Positive-bias value
0 V
Published in approved 6FH5 target entry; Section1
Cathode Current
22 mA
Published in approved 6FH5 target entry; Section1
Plate Dissipation
2.2 W
Published in approved 6FH5 target entry; Section1
Grid-Circuit Resistance, for cathode-bias operation
1 MΩ
Published in approved 6FH5 target entry; Section1

Capacitance

Grid to Plate 0.52
0.52 pF
Published in approved 6FH5 target entry; Section1
Grid to Cathode, Heater, and Internal Shield . . 3.2
3.2 pF
Published in approved 6FH5 target entry; Section1
Plate to Cathode, Heater, and Internal Shield . 3.2
4 pF
Published in approved 6FH5 target entry; Section1

Characteristic

Plate Voltage
135 V
Published in approved 6FH5 target entry; Section1
Grid Voltage
1 V
Published in approved 6FH5 target entry; Section1
Plate Resistance (Approx.)
5600 Ω
Published in approved 6FH5 target entry; Section1
Transconductance
9000 µS
Published in approved 6FH5 target entry; Section1
Plate Current
11 mA
Published in approved 6FH5 target entry; Section1
Grid Voltage (Approx.) for plate current of 100 /iA
-5.5 V
Published in approved 6FH5 target entry; Section1