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Voltage Radio Detector Converter ·Pentode

SP13C

Mullard straight high-frequency pentode for RF amplification, detector service, and low-frequency amplification. High transconductance and exceptionally high plate resistance provide substantial gain across several receiver signal-processing roles.

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

Description

The Mullard SP13C is a straight high-frequency pentode for RF, detector, and low-frequency amplifier service.

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
13 V
Nominal heater current
200 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
2900000 Ω
Transconductance
0.0028 S
Max plate voltage
200 V
Max screen voltage
200 V
Max plate dissipation
1 W
Max screen dissipation
0.3 W
Max cathode current
6 mA

HF receiving pentode.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater Voltage

    13 V

  • Heater Current

    200 mA

  • Heating Time

    60 s

  • Plate Voltage

    200 V

    RFAmplifier

  • Screen Voltage

    200 V

    RFAmplifier

  • Plate Current

    2.5 mA

    RFAmplifier

  • Transconductance

    2800 uS

    RFAmplifier

  • Plate Resistance

    2900000 ohm

    RFAmplifier

  • Amplification Factor

    7000 ratio

    RFAmplifier

  • Plate-Grid Capacitance Maximum

    0.003 pF

Other

  • Maximum Plate Voltage

    200 V

  • Maximum Plate Dissipation

    1 W

  • Maximum Cathode Current

    6 mA

  • Maximum Screen Voltage

    200 V

  • Maximum Screen Dissipation

    0.3 W