Western electric 414 a brochure
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Page 1
e IRA is a mxn\atufe centoce with ah indirectly heaiec cathoos.
HEATER/\m PLATE
GATHODE, 7? , . .
suppaesson GRID 2 f SCREEN GRID
amfERNAL swam M
\. ,
comm. (st . ma
SUPPRESSOR GRID
B lNTERNAL $H\ELD
Plaie Voltage .................... . .........,.,.... ........ ..... \SC ch15
Screen-Grid Volaqe ....... ............. ......... \0 v3i\s
F|ate Dissioaicn ....... . .... . ... . .... ...... ......... \.7 watts
Screen-Gr\d Dlssipation .. 0,5 wa!
Cathode Current ..,........ l? m~lliamneres
Heater Cathcae Vo\taue ... .... ... . 90 vo\ts
Bulb Temperature ..... . ................ I20° centicvace
GENERAL CHARACTERlSTICS
ELECTRlCAL DATA
Heater Voitaue, b-C or D-C ............ . ..,.. . ... ... ........ 6.3 vc\!s
Heater Current ............. . ..... niBIIamperes
Direct |nKerelectrode Capacitances ...... ,.,.,..,..,
Exernal
Shieiu Sh\e\d
(maA NBIC)
Plate to Grid, Maximum ....... 0.02 'D.02 uuf
\nput ....... ....... ..... u.\ -n.3 uuf
0nout ...... ..... ........ 2.0 ':.9 uuf
.................... Coated Unipotentua
. ,....,.......... Tb-ll?
............. Miniature Butte, 7-pin
....................... Any
Externa\ sh\e\o (RMA aesex connecied ho cathuaes-pins #2 and #7.
Operating Conditions and Characteristics on Reverse Side
Page 2
OPERATING CONDITIONS AND CHARACTERISTICS
Plate Voltage .......... ...... ...... .
Screen-Grid Voltage ..
Cathode Resistor ...... ...
Plate Current ...................... .....
Screen-Grid Current .
m
0
volts
volts
onus
miI I iamperes
.. milliamperes
. 0.35 megohm
8
0| (0 o
-ZU|
Plate Resistance .....
Transconductance ...................... .. 2750 micromnos
GI'IIJ Voltage (approxlrate) for I0 Microamperes Plate Current . ...... -9.5 volts
1:60 VOLTS
PLATE CURRENT
IN MILLIAMPERES
BO 120 I60 200
PLATE VOLTAGE
0 40
E;=¢.a vous
lac-=60 vous
Ec.= '1
|
u
SCREEN GRID CURRENT
IN MILLIAMPERES
'I I
b (d
0 40 80 120 160 200
PIATE VOLTAGE
E{=6.3 vous
Eb' =90 75 60 45
PLATE RESISTANCE
IN MEGOHMS
0
-12 -I0 - 8 -6 -4 -2
CONTROL GRID VOLTAGE
O
PLATE CURRENT
IN MILLIAMPERES
SCREEN GRID CURRENT
IN MILLIAMPERES
IN MICROMHOS
6 Ef=6.3 vous
12
Eb
-I2 -IO -8 -6 -4 -2 0
CONTROL GRID VOLTAGE
=63 vows
Eb
-12 -I0 -3 -e -4 -2 o
CONTROL GRID VOLTAGE
5 s;=¢.3 vous
4000
3000 EbECZ
200)
1000
TRANSCONDUCTANCE
O
CONTROL GRID VOLTAGE
PRINTED IN U.5.A.