4631

Low-voltage directly heated triode for telephone and professional communications service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Low-voltage telephone-service directly heated triode.

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: -
Nominal heater current: -
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

Transconductance: 0.0005 S
Amplification factor: 18
Max screen voltage: 300 V

Published maximum ratings/general electrical characteristics promoted directly; pulse, RF, capacitance, cooling, and service-specific values retained in TUBE_SECTION_PARAMETER.

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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

Application
Telephone equipment / preamplifier

Data set 02

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum plate voltage
1000 V
PromotedValue
Maximum screen-grid voltage
300 V
PromotedValue
Maximum plate dissipation
150 W
PromotedValue
Maximum cathode/plate current
200 mA
PromotedValue
and heater)
250 mA
Published datasheet value
Plate-Core Temperature
250 mA
Published datasheet value

Characteristics

Mu / amplification factor
18
PromotedValue
Heater/filament voltage
26.5 V
Nominal operating value
Heater/filament current
540 mA
Nominal operating value
Oxide-Coated Cathode
80 W
CW
Linear RF Power
40 W
CW
Voltage (ac or dc) — published value 1
26.5 V
Published datasheet value
Voltage (ac or dc) — published value 2
10 V
Published datasheet value
Current at 26.5 volts — published value 1
26.5 V
Published datasheet value
Current at 26.5 volts — published value 2
0.54 V
Published datasheet value
Minimum heating time
60
Published datasheet value
Mu-Factor, Grid No.2 to Grid No.l
18
Published datasheet value
DC Plate Voltage
1000 V
Published datasheet value
DC Grid-No.2 Voltage
300 V
Published datasheet value
DC Grid-No.l Voltage
100 V
Published datasheet value
DC Plate Current
200 mA
Published datasheet value
Plate Dissipation
150
Published datasheet value

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Plate voltage
130 V
Plate current
0.7 mA
Transconductance
0.5 mA/V