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Voltage - Triode (single high frequency) ·Triode

957

High-frequency triode for RF amplification, oscillation, frequency multiplication, or related VHF/UHF signal service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5BD
Socket code
ACORN5
Base pins
5
Nominal heater
1.25 V / 50 mA

Description

Directly heated acorn medium-mu triode for dry-cell battery operation.

Socket description

Acorn 5-pin

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5BD
Socket code
ACORN5
Base pins
5
Nominal heater voltage
1.25 V
Nominal heater current
50 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5BD - 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
20800 Ω
Transconductance
0.00065 S
Amplification factor
13.5
Max plate voltage
135 V

Published Class A amplifier characteristics 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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Tre B5

    2 A

    Tre B57id a triode having 2 moderately high amplii=

  • 4 erthen Taciof. Y1 May be ouzed as 0 Getechor, ampli=

    0 mA

    4 erthen Taciof. Y1 May be ouzed as 0 Getechor, ampli=

  • FILAMENT vOLT#D.C

    25 V

    FILAMENT vOLT#D.C.1 1.25 1.28 .25 wolts

  • FILAME KT CURRENT €

    5 A

    FILAME KT CURRENT €.05 0,10 0,05 ampers

  • SCREEM VOLT. fpax.? = - &

    7.5 V

    SCREEM VOLT. fpax.? = - &7.5 Wolts

  • GRID VOLT. s#) S

    -3 V

    GRID VOLT. s#) S -3 Wolts

  • SCREEN CURREKT =

    4 A

    SCREEN CURREKT = - 04 Williampara

  • Plate—Filansent Fa2

    1.1 pF

    Plate—Filansent Fa2 1.1 - ppf

  • Ingut = z

    1.3 pF

    Ingut = z 1.3 ppf

  • Output = =

    3 pF

    Output = = 3 upf

  • shunt Fésistors ¢f

    25 ohm

    shunt Fésistors ¢f 25 ohms macglh gnould be cpnnected

Characteristic

  • AMPLIFICAT

    4 A

    AMPLIFICAT 108 FACTOR 16 12 4EL

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    135 V

    Published handbook rating

  • Plate voltage

    135 V

    ClassA

  • Control-grid bias

    5 V

    ClassA

  • Plate current

    2 mA

    ClassA

Characteristic

  • Plate resistance

    20800 ohm

    Published handbook characteristic

  • Transconductance

    650 µS

    Published handbook characteristic

  • Heater/filament voltage

    1.25 V

    Published heater/filament rating

  • Heater/filament current

    50 mA

    Published heater/filament rating

Data set 03

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    135 V

    UHFOscillator

  • Control-grid voltage

    -5 V

    UHFOscillator

  • Plate current

    2 mA

    UHFOscillator

Characteristic

  • Amplification factor

    13.5

    Section1

  • Transconductance

    650 µS

    Section1

Data set 04

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    1.25 V

  • HeaterOrFilamentCurrent

    50 mA

  • Application

    Dry-cell battery RF service

Data set 05

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Filament voltage

    1.25 V

    Nominal

  • Filament current

    50 mA

    Nominal

  • Maximum DC plate voltage

    135 V

    Amplifier

  • DC plate voltage

    135 V

    ClassA

  • DC grid voltage

    -5 V

    ClassA

  • DC plate current

    2 mA

    ClassA

Capacitance

  • Grid-to-plate capacitance

    1.2 pF

    No external shield

  • Grid-to-filament capacitance

    0.3 pF

    No external shield

  • Plate-to-filament capacitance

    0.7 pF

    No external shield

Characteristic

  • Amplification factor

    13.5

    ClassA

  • Plate resistance

    20800 ohm

    ClassA; approximate

  • Transconductance

    650 uS

    ClassA