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Voltage Pentode - Sharp Cutoff (single) ·Pentode

12DT6

Seven-pin miniature sharp-cutoff pentode with manufacturer-published ratings, characteristics, and application information. Its abrupt transfer characteristic identifies it as a fixed-gain signal amplifier rather than a remote-cutoff AGC tube.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
7
Nominal heater
12.6 V / 150 mA

Description

12DT6 is A SHARP CUTOFF PENTODE IN THE 7 PIN MINIATURE CONSTRUCTION. Electrical ratings, characteristics, and application information are taken from the supplied datasheet.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
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

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
150000 Ω
Transconductance
0.0008 S
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
1.7 W
Max screen dissipation
1.1 W

Promoted from published ratings/characteristics tables; additional operating points and capacitances retained in TUBE_SECTION_PARAMETER.

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

  • Service

    FM detector / mixer / gain-controlled amplifier

  • Heater Warmup Time

    11 s

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • HEATER VO L.TAGE

    12 V

    HEATER VO L.TAGE 12.E VOLTS

  • FOR GRID #

    2 V

    FOR GRID #2 VOLTAGES UP TO 165 VOLTS 1.]. WATTS

  • FOR GRID #

    2 V

    FOR GRID #2 VOLTAGES BETWEEN 165 AND 330 VOLTS SEE RATING CHART

  • HEATER WARP

    1 s

    HEATER WARP.1—UP TIME (APPROX.) # LL SECONDS

  • HEATER WARM-UP TIME IS DEFINED AS THE TI ME'REQUI RED FOR THE VOLTAGE ACR O5

    5 V

    HEATER WARM-UP TIME IS DEFINED AS THE TI ME'REQUI RED FOR THE VOLTAGE ACR O55 THE NEATER TO REACX

  • HEATER VOLTAGE

    12 V

    HEATER VOLTAGE 12.E VOLTS

  • HEATER CURRENT

    150 mA

    HEATER CURRENT 0,15 AMP.

  • PLATE SUPPLY VOLTAGE

    150 V

    PLATE SUPPLY VOLTAGE 150 VOLTS

  • GRID #

    2 V

    GRID #2 SUPPLY VOLTAGE 100 VOLTS

  • PLATE RESISTANCE (APPROX.)

    0.15 MΩ

    PLATE RESISTANCE (APPROX.) 0.15 MEGOHM

  • GRID #

    1 V

    GRID #1 VOLTAGE (APPROX.) FOR PLATE CURRENT OF 1p µAMP —4.5 voLrs

  • GRID #

    3 V

    GRID #3 VOLTAGE (APPROX.) FOR PLATE CURRENT OF 10 µAMP —3.5 voL Ts

  • PLATE CURRENT

    1.1 mA

    PLATE CURRENT 1.1 MA.

  • GRID #

    2 mA

    GRID #2 CURRENT 2.1 MA.

  • PLATE SUPPLY VOLTAGE

    25 V

    PLATE SUPPLY VOLTAGE 25O 25O 25O VOLTS

  • GRID #

    2 V

    GRID #2 SUPPLY VOLTAGE ZOO lOO LOO VOLTS

  • CATHODE

    81 Ω

    CATHODE-81AS RESISTOR 560 560 560 OHMS

  • PLATE CURRENT

    0.23 mA

    PLATE CURRENT 0.23 0,22 0,21 MA.

  • GRID #

    2 mA

    GRID #2 CURRENT 3,4 5.5 6 MA.

  • GRID #

    1 mA

    GRID #1 CURRENT 0.013 0.6 0.8 MA.

  • AUO1

    0 V

    AUO10 OUTPUT VOLTAGE (RNS, APP-R OX.):

  • GRID #

    2 V

    GRID #2 VOLTAGE EXPRESSED AS a OF

  • GRID #I (Ici)OR GRID #

    2 A

    GRID #I (Ici)OR GRID #2 (Icp) MILLIAMPERES

  • GRID #

    2 A

    GRID #2 MILLIAMPERES

  • PLATE (Ib) OR GRID #

    2 A

    PLATE (Ib) OR GRID #2 (Icz) MILLIAMPERES

  • GRID #

    3 V

    GRID #3 VOLTS

Other

  • MAXIMUM PLATE VOLTAGE

    330 V

    MAXIMUM PLATE VOLTAGE 330 votTs

  • MAXIMUM GRID #

    3 V

    MAXIMUM GRID #3 (SUPPRESSOR) VOLTAGE '28 VOLTS

  • MAXIMUM GRID #

    2 V

    MAXIMUM GRID #2 SUPPLY VOLTAGE 330 voLTs

  • MAXIMUM GkID #

    2 V

    MAXIMUM GkID #2 (SCREEN) VOLTAGE SEE RATING CHART

  • MAXIMUM PLATE DISSIPATION

    1.7 mA

    MAXIMUM PLATE DISSIPATION 1.7 WATTS

  • MAXIMUM GRID #

    2 mA

    MAXIMUM GRID #2 INPUT:

  • CATHODE-BIAS RESISTOR

    560 Ω

    CATHODE-BIAS RESISTOR 560 oHMs

  • PLATE LOAD RESISTOR

    0.27 MΩ

    PLATE LOAD RESISTOR 0,27 0.27 0.27 MEGOHM

  • FOR FIXED-BIAS OPERATION

    0.25 MΩ

    FOR FIXED-BIAS OPERATION 0.25 MEGOHM

  • FOR CATHODE-BIAS OPERATION O

    5 MΩ

    FOR CATHODE-BIAS OPERATION O.5 MEGOHM

  • RATIO OF THE AUDIO OUTPUT VOLTAGE PRODUCED DY j0-PERCENT AMPLITUDE MODULATION OF THE

    4 V

    RATIO OF THE AUDIO OUTPUT VOLTAGE PRODUCED DY j0-PERCENT AMPLITUDE MODULATION OF THE 4. 5-NC

  • MAXIMUM GRID #

    2 V

    — MAXIMUM GRID #2 SUPPLY VOLTAGE RATING