INCH-POUND
MIL-PRF-1/868F
18 June 2008
SUPERSEDING
MIL-E-1/868E
17 March 1977
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, NEGATIVE GRID (MICROWAVE)
TYPE 2C40A
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
Inactive for new design
after 21 July 1997
The requirements for acquiring the electron tube described
herein shall consist of this document and MIL-PRF-1.
DESCRIPTION:
Planar triode, metal-glass.
See figure 1.
Mounting position: Any.
Weight: 1.2 ounces (34 grams) nominal.
ABSOLUTE RATINGS:
CW OSCILLATOR
Parameter:
F
Ef
Eb
Ib
Ehk
Ik
Pp
tk
T(seal)
Ec
Ic
Unit:
MHz
V
V
mA dc
V
mA dc
W
sec
°C
V dc mA dc
Maximum:
3,370
6.6
500
25
±90
33
6.5
---
200
-50
8.0
Minimum:
---
6.0
---
---
---
---
---
60
---
---
---
ANODE PULSED OSCILLATOR
Parameter:
F
Ef
eb
ec
Ehk
Ib
ib
Ic
ic
Pp
tp
Du
T(seal)
Unit:
MHz
V
v
v
V
mA dc
a
mA dc
a
W
µs
--
°C
Maximum:
3,370
6.6
1,400
-100
±90
3.0
2.0
1.5
1.0
4.0
1.5
0.002
200
Minimum:
---
6.0
---
---
---
---
---
---
---
---
---
---
---
TEST CONDITIONS
Parameter:
Ef
Eb
Ck
Rk
tk
Unit:
V
V
µF
Ohms
sec
6.3
250
1,000
200
300
GENERAL:
Qualification Required.
Holding period (MIL-STD-1311) t = 168 hours.
--- See note 1/.
AMSC N/A
FSC 5960
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