MIL-PRF-1/945E
TABLE I. Testing and inspection - Continued.
1/
Unless otherwise specified, the acceptance level for all tests listed under conformance inspection, part 1, shall be 1.0 in
accordance with MIL-PRF-1, Table III, accept on zero (c = 0) sampling plan.
2/
During high voltage pulsed operation, the heater should be varied with input power in accordance with the following formula:
Pi with Ef = 0 for all values of Pi greater than 150.
Ef = 6.3 1 -
150
3/
In addition to the regular markings, the frequency of each 2J50 tube shall be indicated by three colored dots in accordance with the
following color code:
Orange, violet, green................................................... 8,750 to 8,800 MHz
Orange, violet, blue ..................................................... 8,800 to 8,850 MHz
Orange, violet, violet.................................................... 8,850 to 8,900 MHz
NOTE: The dots shall be .125 inch to .312 inch (3.18 mm to 4.76 mm) in
diameter and placed in a row after the type marking.
4/
Field strength must be as specified with the magnet at operating temperature. Field strength to be measured in accordance with
method 1367.
5/
Bandwidth measurements shall be made at each anode current value into a 1.5:1 VSWR transmission line adjusted in phase to
produce maximum spectrum degradation.
6/
Stability shall be measured with the tube operating into a transmission line with a VSWR of 1.5:1 adjusted in phase to produce
maximum instability. The missing pulses shall be counted during any 3-minute period of a test interval not to exceed 6 minutes.
VSWR shall be 1.5:1 minimum with phase varying through a minimum of .50 λ approximately every 15 minutes. Each cycle shall
7/
be conducted in accordance with the following schedule:
Test condition 1 .......................................................... 2 minutes
Test condition 2 .......................................................... 50 minutes
Off .............................................................................. 8 minutes
3
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