MIL-E-1/605E
TABLE I. Testing and inspection. - continued
Limits
MIL-STD-1311
Requirement or test
Conditions
Symbol
Unit
Method
Min
Max
Conformance inspection,
part 3
Life-test
4551
Group C, power output (1)
t
500
---
hr
conditions
Life-test end points:
4551
Power output (1)
4250
Er(Mode 5)/max Po
Po
20
---
mW
Reflector current
4229
See notes 6 and 7
Ir
---
10
ľAdc
NOTES:
1.
No warm-up time is required in order to obtain the specified life from the tube. If extended life is desired, a
heater warm-up period of approximately 1 minute is recommended before the application of the resonator
voltage.
2.
All oscillation tests except vibration tests shall be made with the tube rigidly connected to a UG39/U flange on
approximate R352/U waveguide equipment and the load VSWR for the tube shall be less than 1.1. Forced-air
cooling is required for power inputs above 10 watts.
3.
The temperature of base and cap of the tube shall not exceed 120°C.
4.
The reflector current shall be recorded with a Brush Model BL202 recorder, or equivalent. There shall be no
reflector current bursts greater than the limit shown.
5.
The tube shall be given five shocks in each of three planes. The frequency shift after shock in one plane shall
not exceed the value specified.
6.
After 2 minutes with all voltages applied, total reflector current shall not exceed the specified limits.
7.
The tube shall not be oscillating during the test.
8.
Connection to the tube shall be made with an Amphenol 78-S3S-1001-3 pin connector and a miniature type
cap connector, or equivalents. Flexible leads shall be used in making connections to the tube.
9.
Superimposing sufficient 60-hertz ac voltage on the direct reflector voltage to suppress oscillation on the ends
of the sweep, the mode curve shall be observed on an oscilloscope whose amplifier has minimum bandpass of
0.1 MHz. With a standing wave introducer inserted, there shall be no discontinuities at the maximum power
point for any phase of the standing wave. If the center of the mode is distorted, a wavemeter pip shall not
disappear for an interval of the mode center as the wavemeter is tuned to check for a frequency discontinuity.
3
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