INCH-POUND
MIL-PRF-1/779K
17 October 2008
SUPERSEDING
MIL-E-1/779J
28 January 1981
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, RECEIVING
TYPE 5687WB
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
Inactive for new design
after 7 March 1997.
The requirements for acquiring the electron tube described
herein shall consist of this document and MIL-PRF-1.
DESCRIPTION:
Double triode, miniature, low Mu.
Outline
--- 6-2 (EIA).
Base
--- E9-1.
Envelope
--- T6-1/2.
Cathode
--- Coated unipotential.
Base connections:
Pin no.
---
1
2
3
4
5
6
7
8
9
Element
---
2a
2g
2k
h
h
1k
1g
hct
la
ABSOLUTE-MAXIMUM RATINGS:
Normal
Parameter:
Ef
Eb
Ec Ehk
Rg/g
Ic/g
Ik/k
Pp/p
TE
Alt
Meg Ω
Unit:
V
V dc V dc v
mA dc
mA dc
W
°C
ft
Maximum:
6.6
330
0, 135
0.1
6.0
65
3.75
225
(see
-200
note 3)
13.2
---
---
---
(see note 1)
---
---
(see note 2)
---
---
Minimum:
6.0
---
---
---
---
---
---
---
---
---
12.0
---
---
---
---
---
---
---
---
---
TEST CONDITION (1):
12.6 120
-2
0
---
---
---
---
---
---
Pulse service
Parameter:
Ef
Eb
Ec
eb
egk
ehk
Pg/g
Pp/p
ik/k
Du
tp
Prr
Unit:
V
V dc
V dc
v
v
v
W
W
mA
%
µs
Maximum:
6.6
330
---
660
50,-100
100
0.1
4.0
13.2
---
---
---
---
---
---
---
See figure 1
Minimum:
6.0
---
---
---
---
---
---
---
12.0
---
---
---
---
---
---
---
TEST CONDITIONS (2):
12.6
300
-40
---
40
---
---
---
---
1.0
10
1,000
GENERAL:
Qualification Not Required.
Reliable tube.
AMSC N/A
FSC 5960