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Power - Triode ·Triode

E707

Directly heated power triode for output service, providing 10 watts Class-A output or about 23 watts from two tubes in Class-AB.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
7.2 V / 1.1 A

Description

E707 is listed in the supplied valve table as a power triode. Published operating and characteristic values were transcribed from its target row.

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
7.2 V
Nominal heater current
1.1 A
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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
11000 Ω
Transconductance
0.0035 S
Amplification factor
5

Published target-row operating and characteristic values reviewed.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    800 V

    Published European table row

  • Plate current

    40 mA

    Published European table row

  • Control-grid bias

    80 V

    Published European table row

  • Power output

    10 W

    Published European table row

  • Class-A plate voltage

    800 V

    ClassA OneTube

  • Class-A plate current

    40 mA

    ClassA OneTube

  • Class-A control-grid bias

    80 V

    ClassA OneTube

  • Class-A load resistance

    11000 ohm

    ClassA OneTube

  • Class-A power output

    10 W

    ClassA OneTube

  • Class-AB plate voltage

    800 V

    ClassAB TwoTubes

  • Class-AB plate current per tube

    30 mA

    ClassAB TwoTubes

  • Class-AB power output

    23 W

    ClassAB TwoTubes

Characteristic

  • Plate resistance

    11000 ohm

    Published European table row

  • Transconductance

    3500 µS

    Published European table row

  • Amplification factor

    5

    Published European table row

  • Heater/filament voltage

    7.2 V

    Published European table row

  • Heater/filament current

    1.1 A

    Published European table row

Capacitance

  • Grid-to-plate capacitance

    58 pF

    Published European table row