MIL-PRF-1/1773C
TABLE I. Testing and inspection - Continued.
Limits
Inspection
Method
Notes
Test
Conditions
Symbol
Unit
MIL-
STD-
1311
Min
Max
Conformance inspection,
part 1 - Continued
Pulse stability
1
4315
----
MP
----
0.25
%
6/
3
MP
----
0.25
%
ΔF
----
Frequency pulling
1
4310
----
5
MHz
figure
Note 17 on
Frequency
3
----
Anode T at
F
9,345
9,405
MHz
figures 1
reference point =
thru 4A
+100șC ±10șC
----
Frequency pushing
4311
ΔF/Δib
3
ib = 12 a to 15 a
----
0.1
MHz/a
figure
Conformance inspection,
part 2
10/
Vibration
----
----
Ef = 12.6 V; 15 G;
----
----
----
----
F = 60 Hz; duration
15 minutes; no
heater cathode
shorts during test
Pulse stability
4315
----
3
MP
----
0.5
%
----
5
MP
----
0.25
%
See notes at end of table
TABLE I. Testing and inspection - Continued.
1/
The tube heater shall be protected against arcing by the use of a capacitor that places a minimum capacitance of 4,000 pF
across the heater directly at the input terminals.
2/
A tk of 180 seconds (minimum) with an Ef of 12.6 volts is required before test.
3/
The tube shall be operated into a transmission line with a VSWR of 1.5:1 adjusted in phase to produce maximum spectrum
degradation.
4/
A suitable spectrum shall be considered one in which the major lobe has a shape such that its slope does not change sign
more than once for power levels greater than the specified dB below its peak.
5/
An airflow of 15 cfm at approximately 760 mm Hg shall be directed on the magnetron body from an orifice of 2.5 inches
(63.5 mm) x 1.188 inches (30.18 mm). The temperature rise shall be measured at that point on the anode block as shown
on figure 1 (see figure 1, note 14).
6/
This test shall be the first one performed after 48 holding period.
7/
Air cooling shall be adjusted so that the anode block runs at +150șC, or at the maximum temperature it will reach in the
absence of cooling, whichever is lower. This shall be adjusted during the test condition 3 portions of the cycle.
8/
The tube shall be operated in a transmission line with a load VSWR of 1.5:1 and a variable phase. At specified pressure,
there shall be no evidence of breakdown at the input or output assemblies.
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business