Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Pentode (NOT beam) ·Pentode

SRS552N

RFT transmitting pentode for audio-frequency, radio-frequency, and pulse operation to approximately 65 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 700 mA

Description

Radiation-cooled transmitting pentode suitable for audio-frequency, radio-frequency and pulse operation.

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
700 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
Transconductance
0.0035 S
Max plate voltage
1000 V
Max screen voltage
300 V
Max plate dissipation
40 W
Max screen dissipation
5 W
Max grid dissipation
1 W
Max cathode current
230 mA

Published ratings and characteristics promoted where clearly stated.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    12.6 V

    Nominal

  • HeaterCurrentNominal

    700 mA

    Nominal

  • Maximum Plate Voltage

    1000 V

  • Maximum Screen Voltage

    300 V

  • Maximum Plate Dissipation

    40 W

  • Maximum Screen Dissipation

    5 W

  • MaximumGridDissipation

    1 W

  • Maximum Cathode Current

    230 mA

  • Maximum Frequency

    65 MHz

  • RFOutputPower

    80 W

    Approximately ClassB; <=25 MHz

Characteristic

  • Transconductance

    3500 µS

    Typical