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Voltage Radio Detector Converter ·Pentode-Triode

6F7

Combined triode and pentode for receiver amplifier plus detector/converter applications, integrating multiple radio signal-processing functions in one envelope.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
7E
Socket code
UX7
Base pins
7
Nominal heater
6.3 V / 300 mA

Description

Combined triode and pentode tube for receiver amplifier and detector/converter applications.

Socket description

Small 7-contact (0.75-inch pin circle)

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7E
Socket code
UX7
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7E - 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
16000 Ω
Transconductance
0.0005 S
Amplification factor
8
Max plate voltage
250 V
Max plate dissipation
1 W

Combined triode and remote-cutoff pentode for detector/amplifier service.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
850000 Ω
Transconductance
0.0011 S
Max plate voltage
250 V
Max screen voltage
100 V
Max plate dissipation
1 W
Max screen dissipation
0.25 W

Combined triode and remote-cutoff pentode for detector/amplifier service.

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 2

Pentode

Other

  • Plate Voltage

    100 V

    ClassA; Column1

  • Plate Voltage

    100 V

    ClassA; Column2

  • Plate Voltage

    250 V

    ClassA; Column3

  • Grid Bias

    -3 V

    ClassA; Column1

  • Grid Bias

    -3 V

    ClassA; Column2

  • Grid Bias

    3 V

    ClassA; Column3

  • Amplification Factor

    8

    ClassA; Column1

  • Amplification Factor

    300

    ClassA; Column2

  • Amplification Factor

    900

    ClassA; Column3

  • Plate Resistance

    0.018 ohm

    ClassA; Column1

  • Plate Resistance

    0.29 ohm

    ClassA; Column2

  • Plate Resistance

    0.85 ohm

    ClassA; Column3

  • Plate Current

    3.6 mA

    ClassA; Column1

  • Plate Current

    6.3 mA

    ClassA; Column2

  • Plate Current

    6.5 mA

    ClassA; Column3

  • Transconductance {at =

    35 V

    ClassA; Column1

  • Transconductance {at =

    9 V

    ClassA; Column2

  • Transconductance {at =

    10 V

    ClassA; Column3

  • Maximum Plate Voltage

    100 V

    ClassA; Column1

  • Maximum Plate Voltage

    260 V

    ClassA; Column2

  • Maximm Oscillator Plate Current(average)

    4 mA

    ClassA

  • Plate Voltage

    250 V

    ClassA; Column2

  • Plate Resistance

    2 ohm

    ClassA

  • Conversion Transconductance

    300 uS

    ClassA

  • Plate Current

    2 mA

    ClassA; Column1

  • Plate Current

    2.8 mA

    ClassA; Column2

  • Screen Current

    0.6 mA

    ClassA

  • Oscillator Peak Voltage Input

    7 V

    ClassA

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    300 mA

    Published nominal value

  • Transconductance

    500 µS

    Published operating characteristic

  • Pentode transconductance at -35 V bias

    10 µS

    Remote-cutoff characteristic

Other

  • Conversion transconductance

    550 µS

    FrequencyConverter

SECTION 2

Pentode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    300 mA

    Published nominal value

  • Transconductance

    1100 µS

    Published operating characteristic

Data set 03

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Service

    Triode detector/oscillator

SECTION 2

Pentode

Application

  • Service

    Pentode amplifier

Data set 04

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 2

Pentode

Characteristic

  • Tension chauffage CA ou CC ... - 6,3 volts

    6.3 V

    Tension chauffage CA ou CC ... - 6,3 volts

  • Courant chaufiage 0,3 ampére

    300 mA

    Courant chaufiage 0,3 ampére

  • Tension de chauffage ... ... 6.3 6,3 6,3 volts

    6.3 V

    Tension de chauffage ... ... 6.3 6,3 6,3 volts

  • Tension grille ... .. o0 -3 -3 —3 volts

    3 V

    Tension grille ... .. o0 -3 -3 —3 volts

  • Courant plaque 3,5 6,3 6,5 ma.

    6.5 mA

    Courant plaque 3,5 6,3 6,5 ma.

  • Courant écran ... ... .. . 16 1,5 ma.

    1.5 mA

    Courant écran ... ... .. . 16 1,5 ma.

  • Résistance interne ... .. ... 16, 200 290, 000 850 000 ohms

    0 ohms

    Résistance interne ... .. ... 16, 200 290, 000 850 000 ohms

  • Conductance mutuelle ... ... 525 1050 1,100 ymhos

    1.1 ymhos

    Conductance mutuelle ... ... 525 1050 1,100 ymhos

  • Conductance mutuelle 3 —35 V.

    35 V

    Conductance mutuelle 3 —35 V.

  • Tension grille —10 volts

    10 V

    Tension grille —10 volts

  • Courant plaque ... e v vee enn e 2,4 2,8 ma.

    2.8 mA

    Courant plaque ... e v vee enn e 2,4 2,8 ma.

  • Courant grille 0,15 0 ma.

    0 mA

    Courant grille 0,15 0 ma.

  • Courant @cran . ... ... e aee e aee 0,6 ma.

    0.6 mA

    Courant @cran . ... ... e aee e aee 0,6 ma.

  • Tension de pointe d’oscillation 7 volts

    7 V

    Tension de pointe d’oscillation 7 volts

  • Conductance de conversion ... .. ... 300 ymhos

    300 ymhos

    Conductance de conversion ... .. ... 300 ymhos

Other

  • Tension plaque ... ... .. .. 100 100 250 volts max.

    250 V

    Tension plaque ... ... .. .. 100 100 250 volts max.

  • Tension grille écran ... ... .. - ae 100 100 volts max.

    100 V

    Tension grille écran ... ... .. - ae 100 100 volts max.

  • Tension plague ... v e i e e 100 250 volts max.

    250 V

    Tension plague ... v e i e e 100 250 volts max.

  • Tension écran 100 volt max.

    100 V

    Tension écran 100 volt max.

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    100 V

    ClassA; TriodeSection

  • Control-grid bias magnitude

    3 V

    ClassA; TriodeSection

  • Plate current

    3.5 mA

    ClassA; TriodeSection

  • Plate resistance

    16000 ohm

    ClassA; TriodeSection

  • Transconductance

    500 uS

    ClassA; TriodeSection

  • Amplification factor

    8

    ClassA; TriodeSection

SECTION 2

Pentode

Other

  • Plate voltage

    250 V

    ClassA; PentodeSection

  • Screen voltage

    100 V

    ClassA; PentodeSection

  • Control-grid bias magnitude

    3 V

    ClassA; PentodeSection

  • Plate current

    6.5 mA

    ClassA; PentodeSection

  • Screen current

    1.5 mA

    ClassA; PentodeSection

  • Plate resistance

    850000 ohm

    ClassA; PentodeSection

  • Transconductance

    1100 uS

    ClassA; PentodeSection