INCH-POUND
MIL-PRF-1/1404E
16 July 2004
SUPERSEDING
MIL-PRF-1/1404D
18 June 1999
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, RECEIVING
TYPE 2DF4
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
The requirements for acquiring the electron tube described herein
shall consist of this document and the latest issue of MIL-PRF-1.
DESCRIPTION: Pentode, miniature, power amplifier (100 MHz, class C).
Outline:
6-2(EIA).
Base:
E9-1.
Envelope:
T6-1/2.
Cathode:
Coated filament.
Mounting:
1/
Base connections:
Pin No.
1
2
3
4
5
6
7
8
9
Element
g2
int con
a
f- (+prl)
f+
nc
int con
g1
g3, fct
(-prl)
ABSOLUTE MAXIMUM RATINGS:
Parameter:
Ef
Eb
Ec1
Ec2
Ik
Ic1
Pa
Pg2
Alt
Unit:
V dc
V dc
V dc
V dc
mA dc
mA dc
W
W
ft
250
-75
125
50
4
4.5
1.5
2/
Maximum:
1.44 or 2.88
(pr1)
(ser)
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Minimum:
1.06 or 2.12
(pr1)
(ser)
Test conditions:
2.5
120
-3.6
120
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(ser)
See footnotes at the end of table I.
____________________________________________________________________________________________
GENERAL:
First article testing: Required. 11/
AMSC N/A
FSC 5960
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