MIL-PRF-1/744J
TABLE I. Testing and inspection - Continued.
Limits
Method
Inspection
Notes
Test
Conditions
Symbol
Unit
MIL-STD-1311
Min
Max
Conformance inspection,
part 2
Secureness of base, cap,
1101
2/
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or insert
Low-frequency vibration
1031
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No voltages
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Conformance inspection,
part 3
Life test
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1/
1
Group C
t
500
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hrs
Life-test end points:
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Power output (3)
4250
2
Po
8
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mW
7/
Power output (4)
4250
2
Po
16
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mW
8/
1/
Test tube with 1,000 MHz test cavity as specified on Drawing 166-JAN. Frequency approximately 1,000 MHz. Tube operated
in N = 1 mode (1.75 cycles for complete transit). Adjust Er for maximum power output. Adjust output coupling loop for
maximum power output.
2/
Water-immersion test omitted. Torque shall be applied between upper disk (g3) and molded portion of base and shall be 20
inch-pounds.
3/
Static test; tube not oscillating.
4/
Test tube with 800 MHz test cavity as specified on Drawing 166-JAN. Adjust cavity to resonate at 800.5 MHz with standard
plug as specified on Drawing 197-JAN. Tube operated in N = 1 mode (1.75 cycles for complete transit). Adjust Er for
maximum power output. Adjust output coupling loop for maximum power output.
5/
Reduce Ef to 5.7 V while tube is oscillating. The cathode emission shall not exceed the limit shown.
6/
Test tube with 2,200 MHz test cavity as specified on Drawing 166-JAN. Adjust cavity to resonate at 2,113.8 MHz with
standard plug as specified on Drawing 197-JAN. Tube operated in N = 1 mode (1.75 cycles for complete transit). Adjust Er
for maximum power output. Adjust output coupling loop for maximum power output.
7/
Test tube with 1,150 MHz test cavity as specified on Drawing 166-JAN. Adjust cavity to resonate at 1,130.6 MHz with
standard plug as specified on Drawing 197-JAN. Tube operated in N = 2 mode (2.75 cycles for complete transit). Adjust Er
for maximum power output. Adjust output coupling loop for maximum power output.
8/
Test tube with 2,750 MHz test cavity as specified on Drawing 166-JAN. Adjust cavity to resonate at 2,569.2 MHz with
standard plug as specified on Drawing 197-JAN. Tube operated in N = 2 mode (2.75 cycles for complete transit). Adjust Er
for maximum power output. Adjust output coupling loop for maximum power output.
3
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