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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

CL1

Early European series-heater power pentode for audio-output service in transformerless mains receivers.

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

Description

CL1 is listed in the supplied valve table as a power 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
-
Socket code
P8A
Base pins
8
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
50000 Ω
Transconductance
0.0025 S
Max plate voltage
200 V
Max screen voltage
200 V
Max plate dissipation
5 W
Max screen dissipation
0.8 W
Max cathode current
32 mA

Audio output pentode; maximum ratings and a representative published operating point are promoted.

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

    200 V

    Published table operating point

  • Plate current

    25 mA

    Published table operating point

  • Control-grid bias

    14 V

    Published table operating point

  • Screen voltage

    200 V

    Published table operating point

  • Optimum load resistance

    8000 ohm

    Published table operating point

  • Power output

    9 W

    Published table operating point

  • Maximum plate dissipation

    5 W

    Published table rating

  • Alternate plate voltage

    200 V

    OperatingPoint2

  • Alternate plate current

    40 mA

    OperatingPoint2

  • Alternate control-grid bias

    19 V

    OperatingPoint2

  • Alternate screen voltage

    100 V

    OperatingPoint2

  • Alternate load resistance

    5000 ohm

    OperatingPoint2

  • Alternate power output

    8.8 W

    OperatingPoint2

Characteristic

  • Transconductance

    2500000 µS

    Published table characteristic

  • Plate resistance

    50000 ohm

    Published table characteristic

  • Heater/filament voltage

    13 V

    Published heater/filament rating

  • Heater/filament current

    200 mA

    Published heater/filament rating

  • Alternate transconductance

    3100 µS

    OperatingPoint2

  • Alternate plate resistance

    23000 ohm

    OperatingPoint2

Data set 02

195X Tunsgram

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Typical plate voltage

    200 V

  • Typical screen voltage

    200 V

  • Typical plate current

    25 mA

  • Typical control-grid voltage

    -14 V

  • Output power

    1.8 W

    Single-ended published operating point

  • Load resistance

    8000 Ohm

    Single-ended published operating point

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • leistung von

    6 W

    Published datasheet specification

  • spannung

    3 V

    Published datasheet specification

  • HelzZStrom o vttt e e it et it eeen i eeeneeannnnen If —

    200 A

    Published datasheet specification

  • Anodenspannung . .....iieiiiiiie i Va

    200 V

    Published datasheet specification

  • Schirmgitterspannung ..., i iiiiiiiiie e Vg2

    200 V

    Published datasheet specification

  • Neg. GIttervorspannung ......eveeereennnnnniossos Vg1

    14 V

    Published datasheet specification

  • Anodenstrom ... il e la

    25 mA

    Published datasheet specification

  • SchirmgitterStrom .....ovii it Ig

    2.4 mA

    Published datasheet specification

  • Max. Steilhelt .. ... i e e S max —

    5 mA/V

    Published datasheet specification

  • Norm. Steilheit (bei Ja — 25 mA) ...........couot.. Snorm

    2.5 mA/V

    Published datasheet specification

  • Innerer Widerstand (bei /a

    25 mA

    Published datasheet specification

  • Maximale Anodenleistung ........... .. .. ... oL, Wamax

    5 W

    Published datasheet specification

  • Rgl max

    1 MOhm

    Published datasheet specification

  • Heizfaden .... Rfkmax

    20 Ohm

    Published datasheet specification

  • Heizfaden .. .. Vikmax

    175 V

    Published datasheet specification

  • Published specification

    2

    Published datasheet specification

  • als

    0 Ohm

    Published datasheet specification

  • Va — Vg2

    200 V

    Published datasheet specification

  • Published specification

    0

    Published datasheet specification

  • R S

    40

    Published datasheet specification

  • Published specification

    0 V

    Published datasheet specification