INCH-POUND
MIL-PRF-1/846M
4 July 2014
SUPERSEDING
MIL-PRF-1/846L
17 March 2008
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, MAGNETRON
TYPE 2J51A
This specification is approved for use by all Departments
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: Pulsed, mechanically tunable frequency 8,500 to 9,600 MHz, 45 kw peak power output, integral
magnet, air cooled.
ABSOLUTE RATINGS:
Tuner
Alt
tk
Parameter:
Ef
tpc
Du
Pi
ib
VSWR
T(anode)
torque
µs
°C
Unit:
V
---
sec
ft
W
a
---
in.-lb.
7.0
Maximum:
3.4
0.0011
---
230
15.5
1.5
150
2.5
10,000
Minimum:
---
0.1
---
120
---
---
12.5
---
-55
---
PHYSICAL CHARACTERISTICS:
Dimensions:
See figure 1.
Marking:
See 1/ and figure 1.
Mounting position:
Any.
Magnet isolation:
See 3/ and figure 2.
Mounting support:
Mounting flange (see figure 1).
Weight:
5 pounds (approximate).
Output coupling:
See 2/ and figure 1.
TEST CONDITIONS:
Parameter:
Ef
tpc
trv
Du
Ib
VSWR
F
Frequency 1/
µs
µs
Unit:
V
---
mA dc --- (max)
MHz
F
MHz
MHz
(max)
1.0 ± 0.1
Test condition 1:
0
0.07
0.001
14
1.10:1
F1, F3, F5
F1
8,500
10
5.0 0.11 ± 0.01
Test condition 2:
0.07
0.00033
4.7
1.10:1
F1, F3, F5
F2
8,600
10
0 3.50 ± 0.1
Test condition 3:
0.12
0.0011
15.5
1.10:1
F1, F3, F5
F3
9,000
10
F4
9,375
13
F5
9,600
20
See footnotes at the end of table I.
_________________________________________________________________________________
GENERAL:
Qualification - Required.
AMSC N/A
FSC 5960
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
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