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Voltage Dual Triode Pentode ·Pentode-Triode-Triode

12AF11

No short description is recorded for this tube.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 450 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
12.6 V
Nominal heater current
450 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

3 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
12400 Ω
Transconductance
0.0055 S
Amplification factor
68
Max plate voltage
330 V
Max plate dissipation
1.1 W

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9400 Ω
Transconductance
0.0044 S
Amplification factor
41
Max plate voltage
330 V
Max plate dissipation
2 W

Section 3

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
68000 Ω
Transconductance
0.011 S
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
5 W
Max screen dissipation
1.25 W

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

1970 Sylvania Technical Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Voltage

    200 V

  • Grid Voltage

    -2 V

  • Plate Current

    7 mA

  • Grid To Plate Capacitance

    1.9 pF

  • Input Capacitance

    3 pF

  • Output Capacitance

    2.2 pF

SECTION 2

Triode

Other

  • Plate Voltage

    200 V

  • Plate Current

    9.2 mA

  • Grid To Plate Capacitance

    3.6 pF

  • Input Capacitance

    2.4 pF

  • Output Capacitance

    3.8 pF

SECTION 3

Pentode

Other

  • Plate Voltage

    200 V

  • Screen Voltage

    150 V

  • Plate Current

    24 mA

  • Screen Current

    4.8 mA

  • Grid To Plate Capacitance

    0.12 pF

  • Input Capacitance

    10 pF

  • Output Capacitance

    4.5 pF