Western electric 410 a brochure

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BELL SYSTEM PRACTICES SECTION AB46.410A
Transmission Engineering and Data Issue 3, October 1962
Electron Tube Data A.T.& T. Co. Standard

ELECTRON TUBE DATA, SHEET
WESTERN ELECTRIC 4IOA ELECTRON TUBE

DESCRIPTION

~' lectro mercury-vapor thyratron with a negative control
' ube is designed for use in controlled rectifier or inverter

e oltege ........................ 1500 volts
athode Current ..................... 8 emperea

FILE: THYRATRON SECTION

© American Telephone and Telegraph Company 1962

4|0A

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410A - Page 2

MAXIIUI RATINGS, ABSOLUTE VALUES

Peak Anode Voltage
Inverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500 volts
Forward . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500 volts
Cathode Current
Peak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 anperes
Average . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 amperes
Surge (maximum duration 0.1 second) . . . . . . . . . . . . . . 320 amperes
Averaging Time . . . . . . . . . . . . . . . . . . . . . . . . 15 seconds
Negative Grid Voltage
Before Conduction . . . . . . . . . . . . . . . . . . . . . . . 500 volts
During Conduction . . . . . . . . . ..... . . . . . . . . 10 volts
Positive Grid Current, Average
(Averaging tine - one cycle). . . . . . . . . . . . . . . . . . 0.25 ampere
Condensed Mercury Temperature Limits . . . . . . . . . . . +30 to +80 centigrade

lLEflIBISAL.DAIA

Filament Voltage . . . . . . . . . . . . . . . . 2.37 2.5 2.62 volts

Filament Current at 2.5 volts . . . . . . . . . ---- 18 £1 amperes
Filament Heating Tine Required . . . . . . . . . 60 ---- ---- seconds
Anode to Grid Capacitance . . . . . . . . . . . ~--- 15 ---~ uuf.
Grid to Filament Capacitance . . . . . . . . . . ---- 15 ---- uuf.

Deionization Time, Approximatel
Ebb-1500 volts;Ib-16 anperes; . . . . . . . .}

noc--3o volts;TEg-SOC:Rg-5000O ohms . . . . . "" 15°° "* i°'°°°°a

Ebb-500 volts;Ib-16 amperes; . . . . . . . . . _
Eoo'-30 volts;THg-500;Rg-50000 ohms . . . . . "" 30° "" m1°r°39°°nd3
Ionization Time, Approximate2
Ebb-100 volts;THg-LOC;Grid Ovarvoltage-S volts ---- 15 ---- microseconds
Ebb-100 volts;TEg-800;Grid Overvoltage-ZS volts ---- 2 ---- microseconds
Anode Voltage Drop . . . . . . . . . . . . . . . ---- 12 ---- volts
IECHANICAL DATA
Type of Cooling . . . . . . . . . . . . . . . . . . . . . . . . . Convection

Equilibrium Condensed Mercury Temperature
Rise Above Ambient
At Full Load (approximate). . . . . . . . . . . . . . . . . . . . 28 Centigrade
At No Load (approximate). . . . . . . . . . . . . . . . . . . . . 16 Centigrade
lounting Position . . . . . . . . . . . . . . . Vertical, filament terminals down

Net Weight, Approximate . . . . . . . . . . . . . . . . . . . . . 1.8 pounds

1. Deionization tine decreases with an increase in negative grid voltage
or with a decrease in (a) condensed mercury temperature (THg) (b) grid
resistance or (c) anode current immediately preceding the and of conduction. ,

2. Ionization time decreases with an increase in (a) anode voltage, (b) condensed
mercury temperature (THE) or (c) grid overvoltage. Grid overvoltage is defined
as the magnitude by which the applied voltage exceeds, in a positive direction,
the critical grid voltage value. Critical grid voltage is the instantaneous
value of grid voltage at the time when anode current starts to flow.