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Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode

12AV6

Double-diode high-mu triode combining detector and audio voltage-amplifier functions. The diode sections recover and rectify receiver signals while the high-gain triode provides substantial audio-frequency voltage amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
7BT
Socket code
B7G
Base pins
7
Nominal heater
12.6 V / 150 mA

Description

Twin-diode triode for detection and AF amplification.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7BT
Socket code
B7G
Base pins
7
Nominal heater voltage
12.6 V
Nominal heater current
150 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7BT - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN11G1AG1 — Control Grid

EIA source label 1G1; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BT

PIN2KAK — Cathode

EIA source label K; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BT

PIN3H—H — Heater

EIA source label H; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BT

PIN4H—H — Heater

EIA source label H; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BT

PIN52PBP — Plate (Anode)

EIA source label 2P; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BT

PIN63PCP — Plate (Anode)

EIA source label 3P; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BT

PIN71PAP — Plate (Anode)

EIA source label 1P; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BT

Section ratings

3 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Representative section for two detector diodes sharing a cathode.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
62500 Ω
Transconductance
0.0016 S
Amplification factor
100
Max plate voltage
300 V
Max plate dissipation
0.5 W

Published ratings and characteristics promoted from the approved French source.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second physical detector diode; duplicated from identical diode section.

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 2

Triode

Other

  • Plate Voltage

    250 V

Characteristic

  • Plate Current

    1.2 mA

Data set 02

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Diode

Application

  • Application

    Detector text

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Heater Voltage (ac/dc) 4.2 6.3

    12.6 V

    Published in approved 6AV6 target entry; Section2

  • Heater Current 0.45 0.3

    150 mA

    Published in approved 6AV6 target entry; Section2

Capacitance

  • Triode Grid to Triode Plate

    2 pF

    Published in approved 6AV6 target entry; Section2

  • Triode Grid to Cathode and Heater

    2.2 pF

    Published in approved 6AV6 target entry; Section2

  • This value is

    1.2 pF

    Published in approved 6AV6 target entry; Section2

  • Plate Voltage

    330 V

    Published in approved 6AV6 target entry; Section2

  • Grid Voltage, Positive-bias value

    0 V

    Published in approved 6AV6 target entry; Section2

  • Plate Dissipation

    0.55 W

    Published in approved 6AV6 target entry; Section2

Characteristic

  • Plate Voltage 100

    250 V

    Published in approved 6AV6 target entry; Section2

  • — 1

    -2 V

    Published in approved 6AV6 target entry; Section2

  • Plate Resistance 80000

    62500 Ω

    Published in approved 6AV6 target entry; Section2

  • Plate Current 0.50

    1.2 mA

    Published in approved 6AV6 target entry; Section2

  • Plate Current (Each Unit)

    1 mA

    Published in approved 6AV6 target entry; Section2

SECTION 2

Triode

Other

  • Heater Voltage (ac/dc) 4.2 6.3

    12.6 V

    Published in approved 6AV6 target entry; Section1

  • Heater Current 0.45 0.3

    150 mA

    Published in approved 6AV6 target entry; Section1

Capacitance

  • Triode Grid to Triode Plate

    2 pF

    Published in approved 6AV6 target entry; Section1

  • Triode Grid to Cathode and Heater

    2.2 pF

    Published in approved 6AV6 target entry; Section1

  • This value is

    1.2 pF

    Published in approved 6AV6 target entry; Section1

  • Plate Voltage

    330 V

    Published in approved 6AV6 target entry; Section1

  • Grid Voltage, Positive-bias value

    0 V

    Published in approved 6AV6 target entry; Section1

  • Plate Dissipation

    0.55 W

    Published in approved 6AV6 target entry; Section1

Characteristic

  • Plate Voltage 100

    250 V

    Published in approved 6AV6 target entry; Section1

  • — 1

    -2 V

    Published in approved 6AV6 target entry; Section1

  • Plate Resistance 80000

    62500 Ω

    Published in approved 6AV6 target entry; Section1

  • Plate Current 0.50

    1.2 mA

    Published in approved 6AV6 target entry; Section1

  • Plate Current (Each Unit)

    1 mA

    Published in approved 6AV6 target entry; Section1