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Voltage Pentode - Sharp Cutoff (single) ·Pentode

EF6

Philips high-frequency sharp-cutoff pentode for fixed-gain RF voltage amplification in European receiver equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
P-SIDECONTACT
Socket code
P8A
Base pins
8
Nominal heater
6.3 V / 200 mA

Description

EF6 is listed in the supplied valve table as a HF pentode. Published operating and characteristic values were transcribed from its target row.

Socket description

European 8-pin side-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
P-SIDECONTACT
Socket code
P8A
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

P-SIDECONTACT - 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
2500000 Ω
Transconductance
0.005 S
Max plate voltage
300 V

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

Pentode

Other

  • Plate voltage

    250 V

    Published European table row

  • Screen voltage

    100 V

    Published European table row

  • Plate current

    3 mA

    Published European table row

  • Control-grid bias

    2 V

    Published European table row

Characteristic

  • Plate resistance

    2500000 ohm

    Published European table row

  • Transconductance

    5000 µS

    Published European table row

  • Heater/filament voltage

    6.3 V

    Published European table row

  • Heater/filament current

    200 mA

    Published European table row

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

    Heating

  • Heater current

    200 mA

    Heating

  • Maximum plate voltage

    300 V

    Promoted published datasheet value

  • Vo - - max,

    550 V

    Limiting values

  • Va max

    300 V

    Limiting values

  • Vo- - max

    550 V

    Limiting values

  • Vg - max

    125 V

    Limiting values

  • Fao (ge = + 0.3 1) . . max. —

    1.3 V

    Limiting values

  • Supply Anode Anode Screen- Screen Max. Ya =

    250 V

    Limiting values

Characteristic

  • Plate resistance

    1000000 Ω

    Promoted published datasheet value

  • Transconductance

    1800 µS

    Promoted published datasheet value

  • licaiak —fi’ ' “4t){o Heater current Iy =

    200 mA

    Published datasheet value

  • Vg, =

    100 V

    Published datasheet value

  • Published electrical value

    100 V

    Published datasheet value

  • Anode voltage . . . . . . . . .. ¥V, =

    100 V

    Published datasheet value

  • Screen-grid voltage. . . . . . . . ¥, = 100 vV

    100 V

    Published datasheet value

  • sid bias . . . . . L L L L L Ty = —

    2 V

    Published datasheet value

  • Anode current . . . . . .. . . . I, =

    3 mA

    Published datasheet value

  • Screen grid current . . . . . . . I, =

    8 mA

    Published datasheet value

  • Mutual conductance . . . . .. . § =

    18 mA/V

    Published datasheet value

  • Internal resistance . . . . .. . R; =

    1 MΩ

    Published datasheet value

  • of the grid bias for Va =

    150 V

    Published datasheet value

  • Ta = Vi =

    250 V

    Published datasheet value

  • Supply Anode Anode Screen- Screen- | Cathode | Voltage | 1, = }fvg‘ =

    9250 V

    Published datasheet value