1、 MIL-PRF-1/1589E 17 January 2012 SUPERSEDING MIL-PRF-1/1589D(NAVY) 12 July 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, KLYSTRON TYPE 8237 * This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube de
2、scribed herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Amplifier, pulsed, 2,900 to 3,100 MHz. ABSOLUTE RATINGS: Parameter: Unit: Ef V ac if (surge) a tk minutes I(focus) A epy kv epx kv ik a Ik mA Pi kW Du - Maximum: Minimum: 7.88 7.12 54 - - 12 6.0 3.8 23/ 105
3、 - 2/ 30 - 68 - 285 - 24 - 0.0042 - 4/ Parameter: Unit: Po kW tp s prr pps VSWR - T(outlet coolant) C Coolant flow (distilled water) GPM Coolant flow (60/40 ethylene glycol) GPM Maximum: Minimum: 6.72 - 11 - 3/ 2,000 - 2.5:1 - 85 - 7/ Collector - 4 Body - 0.625 Collector - 8 Body - 2 Parameter: Unit
4、: Waveguide pressurization (dry air) psia Hydrostatic pressure psig TA C TA C Maximum: Minimum: 55 24 200 - Operating +85 -20 Nonoperating +85 -62 7/ PHYSICAL CHARACTERISTICS: Base: Mounting: Weight: Special (See figure 1). 5/ 130 pounds (max). Input: Output: Dimensions: Coaxial connector UG-972/U.
5、“S“ band waveguide. See figure 1. TEST CONDITONS: Parameter: Unit: Ef Vac tk minutes I(focus) A epy kv pd - tp s Du(rf) - VSWR - Coolant flow (distilled water) GPM Tolerance: - minimum - 5 - 1 - - - Collector Body Test 1: 7.5 12 23/ 90 15/ 10 0.0042 1.2:1 6.0 1.5 Test 2: 7.8 12 23/ 96 2/ 15/ 10 3/ 0
6、.0039 4/ 1.5:1 6.0 1.5 See footnotes at end of table I. _ GENERAL: Qualification - Not required. This specification sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III. _ * Replaces types: VA811C, L-3742. AMSC N/A FSC 5960 INCH-POUND Provided by IHSNot for ResaleNo repr
7、oduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 2 TABLE I. Testing and inspection. Method Limits Inspection MIL-STD-1311 Notes Test Conditions Symbol Min Max Unit Conformance inspection, part 1 Pressurizing (waveguide) 4003 1/ 8/ - Method A; 55 psia; t = 900 - - - - Hyd
8、rostatic pressure - 8/ - 140 psig; collector and body inlet closed - - - - Forced cooling (pressure drop) 1143 - - 4 GPM to collector 1 GPM to body (distilled water) P P 6 4 20 20 psia psia Heater current, nonoperating 4289 - - Ef = 7.5 V; tk = 720 (minimum) If 27 38 A Electrode current (cathode) 12
9、56 - 1 pd = 0 ik 49.6 58.4 a Power output 4250 6/ 14/ 1 F = 2,910 to 3,100 MHz po - - kw Output power variation (1) 4251 21/ 1 pd = 1 dB from the identification plate value; F = 2,980 to 3,100 MHz po(1) - - kw Output power variation (2) 4251 9/ 21/ 1 I(focus) = 2 percent from identification plate va
10、lue po(2) - - kw Cathode emission 4214 17/ 1 pd = 0 ik/ik - 10 % Stability 4261 - 1 pd = 0 po - 2 w X-radiation 4006 14/ 16/ 1 - - 3 mr/hr Conformance inspection, part 2 Permanence of marking 1105 - - - - - - Output power variation (3) 4251 22/ 1 epy = 90 kv +3 to -7 percent po(3) - - kw Direct-inte
11、relectrode capacitance 4266 13/ - Cak - 30 pF Internal arc - 19/ 2 F = 2,980 to 3,100 MHz - - - - Conformance inspection, part 3 Life test - 6/ 1 Group D t 1,000 - hrs Life test end-point: Power output - 4250 - 1 2,980 to 3,100 MHz po 800 - kw See footnotes at end of table. Provided by IHSNot for Re
12、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 3 TABLE I. Testing and inspection - Continued. Method Limits Inspection MIL-STD-1311 Notes Test Conditions Symbol Min Max Unit Conformance inspection, part 3 - Continued Low-frequency vibration 1031 10/ 18/ 24/
13、- No voltages applied - - - - Variable-frequency vibration 1031 10/ 18/ 24/ - No voltages applied - - - - Vibration fatigue 1031 18/ 24/ - Ef = 7.5 V - - - - Shock, specified pulse 1042 12/ 18/ 24/ - 10 G; t = 11 ms; no voltages applied - - - - Humidity 1011 18/ 24/ - t = 96 hours - - - - Ion pumps
14、4268 11/ 18/ - - - - - Heater resistance, cold - 18/ - - 0.023 0.030 Ohms Waveguide arc - 18/ 20/ 1 VSWR = 1.5:1 - - - - 1/ Inspection shall be 100 percent. 2/ Any short transient spike on the voltage pulse shall not exceed 115 kv in magnitude. 3/ The pulse duration (tp) is defined as the time inter
15、val between the first and last instances at which the instantaneous amplitude attains 90 percent of the peak amplitude excluding spikes. 4/ One scan cycle shall consist of rf pulses of 10, 4.6, or 2.5 s programmed within the following limits: a. The maximum instantaneous duty cycle (defined as d/D,
16、where d = pulse width in seconds and D = time separation in seconds between the leading edges of two successive pulses) shall be 0.011. b. The scan cycle program shall be such that the average duty cycle shall not exceed 0.0042 over the scan cycle which shall have a maximum duration of 30,000 s. 5/
17、The tube under test (TUT) shall be mounted with its beam axis within 30 degrees of the vertical. A flexible length of waveguide or other equivalent connection shall be provided between the TUT output flange and load or output waveguide system to prevent excessive forces from being applied to the out
18、put flange. The cathode stem shall be immersed in oil as shown on figure 1. 6/ The TUT shall amplify frequencies over the band from 2,910 to 3,100 MHz without any change of the electrical or mechanical parameters. Further, in setting up for the conformance inspection, part 1 tests, the focus coil cu
19、rrents, the drive power, and other parameters (within their specific ranges), shall be adjusted to the values specified herein. Once adjustment values are set, no further change in values shall be allowed. 7/ During storage and extended nonoperating periods, the coolant shall be removed to avoid dam
20、age to the tube and cooling paths shall be dried and sealed. 8/ There shall be no leakage at maximum limit specified herein. 9/ The TUT shall provide the power output specified herein when each coil current is varied 2 percent of the value specified on the identification plate. All coil current shal
21、l be varied simultaneously in the same polarity. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 4 TABLE I. Testing and inspection - Continued. 10/ The TUT shall be vibrated in each of two planes specified below: a. Where the orientat
22、ion of the TUT has the main axis and major cross section of the TUT elements normal to the direction of the accelerating force. b. Where the orientation of the TUT has the main axis of the TUT normal and the major cross section parallel to the accelerating force. 11/ The Vacion pump, or equivalent,
23、shall have the following ratings: ABSOLUTE RATINGS: Unit: kV mA V(pk ripple) Maximum: 3.2 10 108 Minimum: - - - Absolute ratings for the pump apply during all conditions. The pump current is proportional to the voltage applied and the pressure in the pump. The pump is operative when the applied volt
24、age is between 2.0 and 3.2 kV. 12/ This test shall be conducted prior to all electrical tests. The TUT shall be subjected to a total of 20 shocks; five shocks in each of the planes specified below: a. Where the orientation of the TUT has the main axis and major cross section of the TUT elements norm
25、al to the direction of the accelerating force. b. Where the orientation of the TUT has the main axis of the TUT normal and major cross section parallel to the accelerating force. c. Where the orientation of the TUT has the main axis parallel to the accelerating force and the base down or toward the
26、hammer. d. Where the orientation of the TUT has the main axis parallel to the accelerating force and the base up and away from the hammer. 13/ The anode to cathode capacitance shall be measured with the TUT in the air, without filaments and beam voltage leads connected. 14/ RF power output versus fr
27、equency: Frequency (MHz) Minimum output power (kw) Maximum output power (kw) 3,100 to 2,980 1,000 1,600 2,970 446 1,600 2,960 178 1,600 2,950 71 1,600 2,940 35.5 1,600 2,930 25 1,600 2,920 20 1,600 2,910 16 1,600 15/ A 316 watt pulse (max) shall be permissible over passband of 2,910 to 3,100 MHz. On
28、ce chosen, the drive power over the passband shall be constant and shall be recorded on the identification plate. A specified tolerance of 0.35 dB will be allowed for instrumentation errors. 16/ X-ray shielding shall be sufficient to reduce X-radiation to 3 mr/hr at a distance of 3 feet from any int
29、egral part of the tube above the bottom pole piece, except for conical regions whose axes are colinear with the axis of each coolant fitting. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 5 TABLE I. Testing and inspection - Continue
30、d. 17/ When operating under cathode current test conditions, Ef shall be decreased from 7.5 to 6.75 V and the cathode emission allowed to stabilize. The percent change in ik shall not exceed the value specified herein. 18/ This test shall be performed during the initial production and once each succ
31、eeding 12-calendar months in which there is production. A regular double sampling plan shall be used, with the first sample of three tubes with an acceptance number of zero, and a second sample of three tubes with a combined acceptance number of one. In the event of failure, the test will be made as
32、 a part of conformance inspection, part 2, code level D, with an acceptance level of 6.5. The regular “12-calendar month“ double sampling plan shall be reinstated after three consecutive samples have been accepted. 19/ Internal arc shall be the first test following the holding period. The TUT shall
33、be operated continuously for 6 hours. The epy shall be applied at 65 kv (min). The time allowed for the voltage to reach 96 kv (min) shall be 10 seconds (max). Immediately following application of epy for the duration of the 6-hour operational tests, the peak cathode current shall be monitored at th
34、e cathode terminal for peak pulse amplitude variation. During the first 15 minutes of the test, the peak cathode current shall not exceed the normal cathode current by 20 percent more than twice. During the remaining 5 hours and 45 minutes, the peak cathode current shall not exceed the normal cathod
35、e current by 20 percent more than once. 20/ Each TUT shall be operated continuously for 1-hour minimum. The frequency for this test shall be at the maximum power point as determined in power output. The phase of the VSWR shall be uniformly varied over a 360 degree range at a maximum rate of 6-cycles
36、 per hour. Under this condition, the pressure in the output waveguide of the tube shall be reduced to 24 psia (max). The tube shall operate for one-half hour with no evidence of waveguide arcing. 21/ Same as 14/ except po = 900 kw minimum for range of 2,980 through 3,100 MHz. 22/ Same as 14/ except
37、po = 700 kw minimum for range of 2,980 through 3,100 MHz. 23/ The tube focus coil to be used with the TUT shall be as shown on figure 2. The focus coil operating current for each of the six coils shall be between 4.0 and 5.5 A, and shall be recorded on the TUT identification plate. 24/ After the com
38、pletion of these tests, the TUT shall meet the requirements of method 4250 (power output). 100)5.7()75.6()5.7(xVEfikVEfikVEfik= Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 6 NOTES: 1. Identification of dimension “P“. Top of mounti
39、ng base to top of waveguide flange. 2. Identification of dimension “R“. Top of mounting base to top of vac-ion pump terminal. FIGURE 1. Outline drawing of electron tube type 8237. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 7 FIGU
40、RE 1. Outline drawing of electron tube type 8237 - Continued. Dimensions Ltr Inches Millimeters Min Max Min Max Conformance inspection, part 1 A 3.285 3.295 83.44 83.69 B 2.012 2.022 51.10 51.36 C - 2.00 - 50.8 D 1.763 2.900 44.78 73.66 E 4.00 - 101.6 - F 4.595 4.655 116.71 118.24 G 5.347 5.357 135.
41、81 136.07 M 30.567 30.941 776.40 785.90 N - 2.375 - 60.32 P 6.307 6.507 160.20 165.28 R 6.313 6.563 160.35 166.70 S 6.922 7.172 175.82 182.17 T 9.296 9.546 236.12 242.47 U 3.662 3.712 93.01 94.28 V .943 .993 23.95 25.22 W 1.50 1.73 38.1 43.9 X 8.925 9.175 226.70 233.04 Y .235 .265 5.97 6.73 Z 2.531
42、2.655 64.29 67.44 AA 4.115 4.365 104.52 110.87 AB 4.735 4.765 120.27 121.03 AC 3.125 3.625 79.38 92.08 AD 1.438 1.562 36.52 39.67 AE 2.938 3.062 74.62 77.77 AF 2.688 2.812 68.27 71.42 AG 2.438 2.562 61.92 65.07 AH 6.687 6.937 169.85 176.20 AM .142 .172 3.61 4.37 AT .235 .265 5.97 6.73 AU 1.876 1.996
43、 47.65 50.70 AV 5.375 5.625 136.52 142.87 AW .565 .685 14.35 17.40 AX 4.469 4.672 113.51 118.67 AY 1.600 1.680 40.64 42.67 AZ .250-28 SST STUD 6.35-28 SST STUD Reference dimensions H 7.750 DIA 196.85 DIA K 8.000 DIA 203.20 DIA L 5.450 138.43 AK .75 DIA 19.0 DIA AL 1.03 DIA 26.2 DIA AN 1.67 42.4 AP .
44、78 19.8 AR .53 13.5 AS .42 10.7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 8 FIGURE 2. Focusing electromagnet. Dimensions Ltr Inches Millimeters Ltr Inches Millimeters Min Max Min Max Min Max Min Max A 2.438 2.562 61.93 65.07 P 1
45、.125 1.625 28.57 41.27 B 4.250 4.374 107.95 111.10 Q 20.250 20.374 514.35 517.50 C 2.438 2.562 61.93 65.07 R .219 .281 5.56 7.14 D 2.657 2.843 67.49 72.21 S .531 .655 13.49 16.64 E 45 45 T 1.063 1.187 27.00 30.15 F 8.015 8.045 203.58 204.34 U 12.625 12.875 320.67 327.02 G 7.775 7.805 197.48 198.25 V
46、 5.358 5.364 136.09 136.24 H 4.250 4.374 107.95 111.10 W 8.487 8.497 215.57 215.82 J 9.047 9.171 229.79 232.94 X 14.688 14.812 373.07 376.22 K 14.688 14.812 373.07 376.22 Y .688 .812 17.47 20.62 L 4.594 4.780 116.69 121.41 Z .375 .385 9.52 9.78 M 4.063 4.125 103.20 104.78 AA 3.313 3.437 84.15 87.30
47、N 2.185 2.205 55.50 56.01 AB .438 .562 11.12 14.27 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 9 FIGURE 3. Focusing electromagnet - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1589E 10 Referenced documents. In addition to MIL-PRF-1, this specification sheet references MIL-STD-1311. The margins of this specification are marked with vertical lines t
