Western electric 422 a brochure

Page 1

BELL SYSTEM PRACTICES SECTION ABL6J+22A
Transmission Engineering and Data ISSUE 2, OCTOBER 1952
Electron Tube Data A.T.& T.CO.STANDRRD

ELECTRON TUBE DATA SHEET
WESTERN ELECTRIC 422A ELECTRON TUBE

Western El
woe. usfi

422A

,1

DESCRIPTION

The [.2211 is a double diode With indirectly heated cathodes. It is used as
a full wave rectifier to supply direct current from an alternating current source.

CHARACTERISTICS

Heater Voltage ---------------------- 5 volts
Maximum Peak Inverse Voltage ---------------- 1800 volts
Maximum D-C Output Current ----------------- [.00 milliamperes

FILE: RECTIFIER SECTION

ISSUE 2 9~52 422 A

Page 2

LZZA-Page 2
GENERAL CHARACTERISTICS
ELECTRICAL DATA

Heater Voltage ---------------------- 5 volts
Heater Current ---------------------- 3 amperes .

MECHANICAL DATA

Cathode ----------------------- Coated unipotential

Bulb ------------------------- ST16

Base ------------------------- Medium Shell Octal

Haunting Position ------------------ Any

Dimensions and pin connections shown in outlined drawing on page L.
RATINGSlDesign-Center Values .
Maximum Peak Inverse Voltage ---------------- 1800 volts
Haximum Steady State Peak Plate Current per Plate ----- 0.9 ampere
Eaximum Transient Peek Plate Current per Plate ------ h anperes
Maximum A-C Plate Supply Voltage per Plate - ------- See rating chart
Maximum Steady State D-C Output Current per Plate - - - - See rating chart
Hinimum Effective Plate Supply Impedance per Plate - - - - 100 ohms
Tube Voltage Drop ( at 300 nilliamperes per plate )- - - - 26 volts
Maximum Bulb Temperaturel ---------------- 150 centigrade
TYPICAL OPERATING CONDITIONS
gull Have Rectifier Input To Filter
A-G Plate Supply Voltage per Plate ------- 385 L50 volts
Input Capacitor ---------------- 10 --- microfarads
Input Choke (minimum) ------------- --- 10 henrys
Effective Plate Supply Impedance per Plate - - ~ 100 -- ohms
D-C Output Current --------------- 300 350 milliamperes
D-C Output Voltage --------------- 395 360 volts

RATING CHART
PERMISSIBLE D-C LOAD CURRENT PER PLATE
VS RMS SUPPLY VOLTAGE PER PLATE
3 220

5200
D.

E E
O 0

IE 3
o o

D-C OUTPUT CURRENT PER PLATE IN MILLIAM
m o m a) 6
o o o o o

o

I
RMS SUPPLY VOLTAGE FER PLATE

Note: Operating point for capacitor input to filter must be within the lower
cross-hatched area designated Capacitor or Choke Input" while that for
choke input to filter must be at some point within either cross-hatched
area.