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Power - Triode Single (under 10W) ·Triode

416B

Low-noise planar microwave triode for amplifier, mixer, and oscillator service from roughly 200 MHz to 4 GHz, with high transconductance and long-life variants.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
DISCSEAL4
Base pins
-
Nominal heater
6.3 V / 1.18 A

Description

Planar microwave triode for amplifier, mixer and oscillator service from about 200 to 4000 MHz, with high transconductance and low noise.

Socket description

Disc-seal planar-triode 4-contact base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DISCSEAL4
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
1.18 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
Transconductance
0.05 S
Amplification factor
200
Max plate voltage
270 V
Max plate dissipation
7.5 W
Max cathode current
33 mA

Promoted fields mapped from printed maximum-rating and characteristic headings; additional published values preserved in parameter rows.

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

194X Western Electric Random

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater/filament voltage

    6.3 V

  • Heater/filament current

    1.18 A

  • Transconductance

    50000 uS

  • Amplification factor

    200

Other

  • Maximum plate/anode voltage

    270 V

  • Maximum plate/anode dissipation

    7.5 W

  • Maximum plate/cathode current

    33 mA

  • Operating frequency

    4000 Mc/s

Data set 02

1965 Ericsson Longlife

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Plate current characteristic point

    30 mA

  • Transconductance

    50000 uS

    AtPlateCurrent=30mA

  • Amplification factor

    300 ratio

  • Noise figure at 500 MHz

    6 dB

    LessThan

Other

  • Plate voltage

    200 V

    Microwave

  • Frequency

    4200 MHz

    Microwave

  • Gain high level

    6 dB

    Output=500mW

  • Gain low level

    10 dB

    Output=50mW

  • Bandwidth

    100 MHz

    3dBDown

Data set 03

196X LM Ericsson

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    1.18 A

  • Transconductance

    50000 uS

  • Amplification factor

    200

Other

  • Maximum plate voltage

    270 V

  • Maximum plate dissipation

    7.5 W

  • Useful frequency range

    200–4000 Mc/s

  • Nominal heater voltage

    6.3 V

Data set 04

2026 Western Electric 400s

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage . . . . . . . v + « « .+

    6.3 volts

    Heater Voltage . . . . . . . v + « « .+ . 6.3 volts

  • Plate Voltage « + + + « o v v o

    4 volts

    Plate Voltage « + + + « o v v o 4 o« o & & 200 volts

  • Gain (

    50 decibels

    Gain (50 milljwatts output) . . . . . e . 9 decibels

  • Bandwidth (

    3 megacycles

    Bandwidth (3 db down) . . . 100 megacycles

  • Hester Voltage(

    3 volts

    Hester Voltage(3) “ s e e s e e e e - 6.3 --- volts

  • Plate Voltage . .« « ¢« & ¢ v o

    4 volts

    Plate Voltage . .« « ¢« & ¢ v o 4 « ¢ o 4 2 o o o o = « . 270 volts

  • Plate Current . . . . & &

    4 milliamperes

    Plate Current . . . . & &4 & & 4 o o s 4+ 4 o 0 s e e e s 33 milliamperes

  • Plate Seal Temperature . . . & & & ¢ ¢ & ¢« & = = s

    4 Centigrade

    Plate Seal Temperature . . . & & & ¢ ¢ & ¢« & = = s 4+ 150° Centigrade

  • Grid Sezl Temperature

    4 Centigrade

    Grid Sezl Temperature . . . + 4 « o « o 2 « o = ¢« « + &« 100° Centigrade

  • Heater-Cathode Voltage . ¢« ¢ « v ¢ v ¢« ¢ ¢ + o “ e s

    45 volts

    Heater-Cathode Voltage . ¢« ¢ « v ¢ v ¢« ¢ ¢ + o “ e s 45 volts

  • Plate Voltage . . . & . . . v v v v e v ot e e e s e

    200 volts

    Plate Voltage . . . & . . . v v v v e v ot e e e s e 200 volts

  • Plate Current . . . . . . . . . v ¢« &

    4 milliamperes

    Plate Current . . . . . . . . . v ¢« & 4 i e e e . e 30 milliamperes

  • Cathode Bias ReEBIStOT . « ¢ v &« v v v s ¢ « o o » » &

    260 ohms

    Cathode Bias ReEBIStOT . « ¢ v &« v v v s ¢ « o o » » & 260 ohms

  • Grid Supply Voltage . . . . . . . . . e s s e e e e s

    8 volts

    Grid Supply Voltage . . . . . . . . . e s s e e e e s 8 volts

  • Gain (

    50 decibels

    Gain (50 Milliwatts Output) + « « + & v & v v v v v o W 9 decibels

  • Gain (

    500 decibels

    Gain (500 Milliwatts CutDub) o v v o v o o o « v o o . 5 decibels

  • Band Width (

    3 megacycles

    Band Width (3 db Down) . . . . . . e e e e e e e e 100 megacycles

  • volts through a circuit resistanca of L

    16 volts

    volts through a circuit resistanca of L4.16 chums.

  • Heater VOltage sesvessnsesncnsssanssansasnssnansansnsitissasasasntane

    6.3 volts

    Heater VOltage sesvessnsesncnsssanssansasnssnansansnsitissasasasntane 6.3 volts

  • Cathode Bias RESiStOr seeresvotosnansnrnonosansassassssansasansnanse

    260 ohms

    Cathode Bias RESiStOr seeresvotosnansnrnonosansassassssansasansnanse 260 ohms

  • Grid Supply Voltage cseassssssssonccarssnasnannsasantaenosssnnannnnd

    8 volts

    Grid Supply Voltage cseassssssssonccarssnasnannsasantaenosssnnannnnd 8 volts

  • FrequenCy ueessasassstasnenstoasoatossasnasnsatassssssasstosnnnarnns

    4000 megacycles

    FrequenCy ueessasassstasnenstoasoatossasnasnsatassssssasstosnnnarnns 4000 megacycles

  • Gain (B

    9 decibels

    Gain (B0 Milliwatts QUutput) cosuesnsoriorssstnanssenatscanasiannnns 9 decibels

  • Gain (

    500 decibels

    Gain (500 Milliwatts Qutput} soviinnsnnnss tessasasserestraasnens 3 decibels

  • Band Width (

    3 megacycles

    Band Width (3 db DOWN) suisesssevrvonsaasesrnssncasnatssssranasantans 100 megacycles