Western electric 412 a brochure

Page 1

BELL SYSTEM PRACTICES
Transmission Engineering and Data
Electron Tube Data

ADVANCE ELECTRON TUBE DATA SHEET

WESTERN ELECTRIC 4|2A ELECTRON TUBE

I
- a MAX.-> "
-MEASURED AT% DIA.
ON BULB

SECTION ABLL6JL12A
Issue 1, January, 19L19
AT&TCO Standard

~412A

MINIATUR
FULL-WAV
. RECTIFIER

HEATER- -N0 connecnon
a (geese, L
2% max. 151.2 g 3% s sec-non I)
5.. BULB 21.32. - 1
2'5 MAX' 2 ' . a
.J
I 1 9
N0 connecnon No CONNECTION

fl

PLATE (SECTION 2) -

K E9-I SMALL BUTTON
SPIN BASE

IIIIIIIJ

Miniature Full-Nave Rectifier

DESCRIPTION

MOUNTING
This tube may be mounted In any position
MAXIMUM RATINGS (Design Center Values)

Peak Inverse Voltage ...............................................
Peak Plate Current per Plate ......I.........I......................
D-C Output Current ..........................................

D-C Heater-Cathode Potential
GENERAL CHARACTERISTICS

ELECTRICAL DATA
Heater Voltage ....................................

Heater Current ............... ....... ... ............................

MECHANICAL DATA

Cathode ..................... .. .. . ... . . ..... .. .. .... .....
Bulb ...... ...... ........ ........................................
Base ............... ..... ... ..... .... ...... .... ........ . .......

TYPICAL OPERATION WITH CONDENSER INPUT FILTER

A-C Plate Voltage per Plate (RMS) .......................

D-C Output Current ............... . ........... .
D-C Output Voltage at Input Filter, Approximate ..
Total Effective Plate Supply Impedance per Plate .

Filter Input Condenser .... ......... ......

ISSUE I 8-4-48

Western Electric

-PLATE (SECTION I)

I250

300 millianneres
.

VOILE

[00 milllamperee

N50 volts

6.3 volts

l.0 ampere

Coated Unipotential
T 6-l/2
Small button 9-pin

300 volts
90 milliamperes
3ND volts
l50 ohms
N microfarads

PRINTED IN U.S.A

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Page 2

SECTION ABI;6.h12A

Page 2
2 Pages

Western Electric

a.