Western electric 398 a brochure

Page 1

BELL SYSTEM PRACTICES
Transmission Engineering and Date
Electron Tube Date

ADVANCE ELECTRON TUBE DATA SHEET

WESTERN ELECTRIC 56 03/398A ELECTRON TU BE

:1
«I ,% MAX.

/7

IIUI\

9n
¢-II-GMAx.-D

113'
41

EIQ

3" MAX
_.

THIS BASE SHALL BE CAPABLE OF
BEING INSERTED IN R MA PROPOSED
GB 8'! GAUGE

CLASS IFICATIDN

Filameutary Power Pentode Anpl1fzer

PLANE OF FILAMENT

NC

SCREEN-
GRID

NC
CONTROL-
GRID

LOCATION AND DIMENSIONS
OF BASE PINS AND PILDTARE
SAME AS FOR 55- RMA

PROPOSED STANDARD BASE

SECTION ABh6.598A
Issue 1, May, 19h8
AT&TGO Standard

POWER PENTO l

AMPLIFIER

FILAMENT

SUPPIRESSOR-
GRID

volt:
matte
volte
watts
nilliamparee

volts

MP.

volts
nillianparee
volts
nillienperee
volts

ohms

ohms
minronhoe
volts e-o
ohms
Iatte

nu 9
ant

W
The tube should be mounted preferably in e vertical position. If mounted In a horizontal
position, the plane through contact pin: 2 ABS 6 must he vertical.
" A 150
Plate Voltage 3-0
Plate Dissipation 150
Screen Voltage 2.5
Screen Dissipation 75
Cathode Current
0 N6 0 'I 0 S A C IRACTER ST 6.3
Filament Voltage 0.5
Filament Current 135
Plate Voltage 50
Plate Current 135
Screen Voltage 4
. Screen Current 0
Suppressor-Grid Voltage 230
Cathode Bias Resistor 92
Amplification Factor 17000
Plate Resistance 5400
Transoonfiuctenea 8.5
' Signal Grid Voltage 2500
Lead Resistance 2.2
Power Output
. IMmECTRODE CAPACITANCE I10 SHIELD
Control-grid to filament, soresn- 9'5
grid and euppreesor-grid 0.3
Plate to uontrol-gxid
Plate to filament, soreen- 7-5

grid and suppressor-grid

ISSUEZ l-B-47

uuf

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Western Electric