MIL-PRF-1/770F
TABLE I. Testing and inspection - Continued.
MIL-STD-1311
Limits
Inspection
Method
Test
Conditions
Symbol
Min
Max
Unit
Conformance inspection, part 3
Life-test provisions
---
1
Group D
t
500
---
hrs
Life-test end points:
---
Power output
4250
1
F = F1, F2, and F3
Po
320
---
W
4308
1
BW
---
RF bandwidth
MHz
2.5
tpc
1/ This specification sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III.
2/ The missing pulses, MP, shall be counted during the last 3 minutes of a test interval not to exceed 6 minutes. A missing pulse
is defined as a rf pulse whose average energy within a ± 1 percent frequency range of the normal operating frequency is 70
percent or less than that of the normal pulse.
3/ The magnetic field should be calibrated in accordance with the following procedure:
a.
With a conventional .125 inch (3.18 mm) pole piece attached to the pole face of the magnet opposite the magnetron
tuner as shown on figure 3.
b.
The magnetic field should then be adjusted for 2,700 gauss at the center of the gap.
c.
Remove the conventional .125 inch (3.18 mm) pole piece and replace it with the magnet with the distortion pole piece as
shown on figure 3.
d.
Coil No. 400; pole tip 1.8 inch (45.72 mm) plus .005 inch (0.13 mm) minus .001 inch (0.03 mm).
4/ During high-voltage operation, it is essential to operate the heater according to the following schedule:
Pi (watts)
Ef (volts)
1,000 to 1,200
8.0
800 to 1,000
10.5
600 to 800
13.0
400 to 600
15.0
Less than 400
16.0
NOTE: The above schedule is valid only for repetition rates of 300 pps, or greater.
3
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