Western electric 413 b brochure

Page 1

BELL SYSTEM PRACTICES AB46.413B
Transmission and Engineering and Data Issue 1, January 1962
Electron Tube Data A.T.& T. Co. Standard

«.13. _a.

ELECTRON TUBE DATA SHEET
WESTERN ELECTRIC 4IBB ELECTRON TUBE

DESCRIPTION

The 4133 is a two-electrode inert-gas-filled cold cathode tube having a high
current rating. In addition to its initial field of use in telephone message regis-
ter circuits it is especially suitable also for use in control circuits such as in
switching or pulse counting apparatus.

CHARACTERISTICS
Forward or Inverse Average Cathode Current . . . . . . 20 200 milliamperes
Average Life, Approximate . . . . . . . . . . . . . 10000 10 hours

File: Cold Cathode Section

© American Telephone and Telegraph Company 1962 4'33

Page 2

4F3B'-PAGE 2

MAXIMUM RATINGS, Absolute System (Note n

Cathode Current(Note 2)

Peak, Forward or Inverse - ~ - - - - - - - - - . - - 200 milliamperes
Average, Forward or Inverse- - - - - - - ' - - - - - 70 milliamperes
Averaging Time - - - - - - - - - - - - - - - - 2 seconds
Ambient Temperature Limits - - - - . - - - - - - -55 to +85 centigrade

ELECTRICAL DATA, Throughout Life

Min. Bogey Max.

Anode Breakdown Voltage

Forward . . . . . . . . . . . . . . . 180 200 255 volts
Inverse . - - . . . . - - 180 200 - volts
Anode Voltage Drop, Forward or Inverse . . . . . . 55 62 75 volts
Ionization Time (Note 3) . . . . . . . . . . . - - 1 - millisecond
Deionization Time, Approximate. . . . . . - . . - - 2 - milliseconds

MECHANICAL DATA

Mount ing Position . . . . . . . . . . . . . . . . . v . . . . . Any
Net Weight, Approximate- - . - . - - - - - - 1.2 Ounces
Dimensions and pin connections shown in outline drawing on page 3.

HANDLING

This tube contains a small amount of krypton-85 gas which is a by-product
radioactive material. The amount of krypton-85 is less than five microcuries, which
is too small an amount to require any special care in use.

Atomic Energy Commission regulations require that the individual tube carton
for tubes containing by-product radioactive material be apprOpriately marked. The
marking includes the statement that tube disposal should be in approved manner.

Approved instructions for disposal of tubes containing krypton-85 are as
follows;

Tubes to be disposed of should be broken or crushed in a well
ventilated place releasing any resulting vapors to the outside
atmosphere. The residual broken or crushed tubes should be dis-
posed of in a normal public trash disposal system. Tubes should be
disposed of at a rate of not more than 100 each week from any one
location. Avoid breathing vapors from broken tubes.

Note 1: In the "Absolute System the maximum ratings specified are limiting values above which the
serviceability of the device may be impaired from the viewpoint of life and satisfactory
performance. maximum ratings, as such, do not constitute a set of operating conditions and
all values may not, therefore, be attained simultaneously.

Note 2: Sufficient resistance must be used in series with the tube to assure that the electrode

currents do not exceed their maximum rated values.

Note 3: with 15 volts overvoltage (15 volts above anode breakdown voltage) when tube is in total
darkness.