INCH-POUND
MIL-PRF-1/1120G
2 July 2004
SUPERSEDING
MIL-PRF-1/1120F
29 June 1999
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, NEGATIVE GRID (MICROW AVE)
TYPE 7289
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: Triode, planar, ceramic and metal.
See figure 1.
Mounting position: Any.
W eight: 2.5 ounces (.71 grams) nominal.
ABSOLUTE RATINGS:
Parameter:
F1
Ef
Eb
eb
epy
Ec
Ik
Ib
ib
Ic
ic
Unit:
GHz
V 2/
V dc
v
kv
V dc
mA dc
mA dc
a
mA dc
a
Maximum:
CW osc
2.5
1,000
---
---
-150
125
---
---
50
---
6.0 ±5%
Anode mod
2.5
---
1,200
---
-150
100
---
---
50
---
6.0 ±5%
CW osc or amp
3/
Anode pulsed
3.0
---
---
3.5
---
---
---
3
---
1.8
6.0 ±5%
osc or amp 1/
Test conditions:
---
6.0
1,000
---
---
Adj
---
100
---
---
---
ABSOLUTE RATINGS:
T
Barometric pressure,
Parameter:
tp
Du
Pp
Pg
tk
TE
(anode shank)
Cooling
reduced
Unit:
W 4/
W 6/
sec
---
---
mmHg
µs
°C 7/
°C
(min)
(Figure 1, note 5)
Maximum:
CW osc
---
---
100
2
60
300
300
---
54
2
60
300
300
---
54
Anode mod
---
---
100
CW osc or amp
5/
Anode pulsed
3
0.0025
27
---
60
300
300
---
---
osc or amp 1/
Test conditions:
---
---
---
---
300
---
---
8/
---
See footnotes at end of table I.
____________________________________________________________________________________________
GENERAL:
Qualification: Required.
AMSC N/A
FSC 5960
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