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Voltage - Triode (single) ·Triode

HL13C

Medium-impedance triode for general amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
British7Pin
Socket code
B4
Base pins
4
Nominal heater
13 V / 200 mA

Description

The Mullard HL13C is a medium-impedance triode for detector and low-frequency amplifier service in DC/AC mains receivers.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
British7Pin
Socket code
B4
Base pins
4
Nominal heater voltage
13 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

British7Pin - 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
12000 Ω
Transconductance
0.0033 S
Amplification factor
40
Max plate voltage
200 V
Max plate dissipation
2 W
Max cathode current
10 mA

Published characteristics and limiting values.

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

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Plate voltage

    200 V

  • Plate current

    5 mA

  • Control-grid voltage

    -3.7 V

  • Cathode resistor

    740 Ohm

Other

  • Voltage gain

    30 ratio

    RCAmplifier

  • Output voltage

    36 V

    RCAmplifier

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater Voltage

    13 V

  • Heater Current

    200 mA

  • Heating Time

    60 s

  • Plate Voltage

    200 V

  • Plate Current

    5 mA

  • Grid Voltage

    -3.7 V

  • Transconductance

    3300 uS

  • Amplification Factor

    40 ratio

  • Plate Resistance

    12000 ohm

  • Plate-Grid Capacitance

    3.1 pF

  • Grid-Cathode Capacitance

    3.9 pF

  • Plate-Cathode Capacitance

    4.6 pF

Other

  • Cathode Bias Resistor

    740 ohm

  • Line Voltage

    200 V

    ResistanceCoupledAmplifier

  • Plate Current

    0.65 mA

    ResistanceCoupledAmplifier

  • Grid Voltage

    -2.6 V

    ResistanceCoupledAmplifier

  • Optimum Load Resistance

    160000 ohm

    ResistanceCoupledAmplifier

  • Maximum Output Voltage

    36 V

    ResistanceCoupledAmplifier; Distortion=5Percent

  • Maximum Plate Voltage

    200 V

  • Maximum Plate Dissipation

    2 W

  • Maximum Cathode Current

    10 mA