1、 INCH POUND MIL-PRF-1/297E 13 November 2009 SUPERSEDINGMIL-PRF-1/297D 3 July 1998 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, MAGNETRON TYPE 2J55 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube d
2、escribed herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Fixed frequency, 9,375 30 MHz, pulse type, integral magnet, rated peak power output 40 kW. ABSOLUTE RATINGS: Parameter: EF tk epy ib Pi pi tpc Du T (anode) Alt Unit: V sec kv a W kw s - - - C ft Maximum: 6
3、.93 - - - 16 16 180 230 2.5 0.001 100 10,000 Minimum: - - - 120 - - - - - - - - - - - - - - - - - - - - - - - - PHYSICAL CHARACTERISTICS: See figure 1. Input connection: See figure 1. Output coupling: Mates with UG52B/U flange (MIL-DTL-3922/59). Magnet isolation: See note 2. WEIGHT: 4 pounds (approx
4、imate). MOUNTING POSITION: Any TEST CONDITIONS: See note 2. Parameter: Ef tk tpc trv Du Ib VSWR T (anode) Unit: V sec s s - - - mA dc - - - C Tolerance: - - - - - - 10 % - - - - - - - - - - - - - - - Test 1: 0 120 (min) 1.0 0.2 (max) 0.001 12 1.15 (max) 80 (approx) Test 2: 2.5 note 3 120 (min) 2.0 0
5、.2 (max) 0.00065 8 1.15 (max) 80 (approx) GENERAL: Qualification - Required. AMSC N/A FSC 5960 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/297E 2TABLE I. Testing and inspection. Inspection Method MIL-STD-1311 Notes Test Conditions Symbo
6、ls Limits Min Limits Max Units Qualification Inspection High-frequency vibration Temperature coefficient Low-temperature operation Barometric pressure, reduced Snap-on stability Forced cooling 1031 4027 1026 1002 4315 1143 - - - - - - - - - - - - 5 4, fig 1 (16) - - - 1 1 1 2 1 No voltages tk = 120
7、(max); TA= -65C Pressure = 380 mmHg (abs) VSWR = 1.1 (max) TA= 25 5C - - - F/T - - - - - - MP T - - - - - - - - - - - - - - - - - - - - - 0.25 - - - - - - 1 50 - - - MHz/ C - - - - - - C Conformance inspection, part 1 Heater current Pulse voltage Pressurizing Power output RF bandwidth Pulling factor
8、 Stability Fixed frequency 1301 4306 4003 4250 4308 4310 4315 - - - - - - - - - - - - - - - - - - - - - 5 - - - 1 - - - 1 - - - 1 1 1 2 1 Ef = 6.3 V 40 to 45 psia t = 300 (max) Ib = 11 to 13 mA dc VSWR = 1.5 VSWR = 1.1 (max) If epy - - - Po BW F MP F 0.90 11 - - - 40 - - - - - - - - - 9,345 1.10 13
9、- - - - - - 3/tpc 15 1 9,405 A kv - - - W MHz MHz % MHz Conformance inspection, part 2 Low-frequency vibration 1031 - - - - - - No voltages - - - - - - - - - - - - Conformance inspection, part 3 Life-test provisions Life-test end points Power output RF bandwidth - - - - - - 4250 4308 - - - - - - - -
10、 - 1 1 1 Group D t Po BW 500 30 - - - - - - - - - 3/tpc hrs W MHz See notes at end of Table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/297E 3NOTES: 1. This specification sheet uses accept on zero defect sampling plan in accordance w
11、ith MIL-PRF-1, table III. 2. In handling and mounting the tube, care shall be taken to prevent demagnetization. Magnetic materials or devices shall not be brought within 2 inches of the tube. 3. The product of the pulse duration in seconds and the pulse recurrence frequency in hertz shall not exceed
12、 0.0007 for pi = 150 kW, or greater, and shall not exceed 0.001 in any circumstance. The pulse recurrence frequency shall be 325 pps, or greater. During high-voltage pulsed operation, the heater voltage should be varied with input power approximately in accordance with the formula: Ef = 6.3 1150Piwh
13、ere: Ef = 0 for all values of Pi greater than 150. The heater should be protected against input pulse power by an appropriate filter. 4. With an airflow, at standard atmospheric pressure, of 65 cfm directed at the cooling fins from an orifice of 1-11/64 inches (29.77 mm) by 1-23/64 inches (34.53 mm)
14、, the rise above the ambient temperature specified shall not be exceeded. The orifice shall be located 0.25 inch (6.35 mm) from the cooling fins. 5. The missing pulses shall be counted during any 3 minutes of a test interval of 6 minutes, or less. A missing pulse is defined as one whose energy withi
15、n a 1 percent frequency range of the normal test frequency is 70 percent of a normal pulse, or less. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/297E 4FIGURE 1. Outline drawing of electron tube type 2J55 . See notes at end of Figure I.
16、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/297E 5NOTES: 1. Output flange to be concentric with the open end of the guide to within 0.010 inch (0.25 mm). 2. The jack holes shall be within a radius of 0.023 inch (0.58 mm) of true locatio
17、n specified but shall be spaced 0.500 inch (12.70 mm) 0.010 inch (0.25 mm) with respect to each other. The center lines of the holes shall be perpendicular to reference plane A within 3. 3. Pyrex glass, porcelain, or approved equivalent. 4. Indicate common cathode connection by letter C. 5. With the
18、 flange resting on a plane surface, the flatness of the mounting plate 0.500 inch (12.70 mm) from the outer edge shall be such that a 0.010 inch (0.25 mm) thickness gauge 0.125 inch (3.18 mm) wide shall not enter for a distance of more than 0.250 inch (6.35 mm). 6. Metal surfaces shall be covered by
19、 painted finish except inside of waveguide, jack terminals and surfaces, covered by note 10. 7. Filament leads shall be flexible and slack. 8. Tolerance includes angular as well as lateral deviations of the surface. 9. Output to mate with UG52B/U flange (MIL-DTL-3922/59). 10. Shall be free from pain
20、t. 11. Leads soldered to terminal clip. 12. All joints in waveguide assembly shall be vacuum tight to provide hermetic seal at flange. 13. All joints in mounting plate shall be vacuum tight to provide hermetic seal. 14. Heater connection. 15. Any portion of the assembly extending above this surface
21、shall be within a 1.109 inch (28.17 mm) radius of the true center of the plate. 16. Anode temperature measurement point. 17. Radiator fins. 18. Reference plane A is defined as a plane passing along the surface of mounting plate as shown. 19. Reference plane B is defined as a plane passing through th
22、e center of the two mounting plate holes at plane A and is perpendicular to plane A. 20. Reference plane C is defined as a plane passing through the center of the mounting plate hole (as shown) at plane A and is mutually perpendicular to planes A and B. 21. Dimensions are in inches. Metric equivalen
23、ts are in parentheses. Dimensions in inches with metric equivalents (mm) in parentheses. Ltr Minimum Maximum Conformance inspection, part 1 (see note 1 Page 3) J 0.417 (10.59) 0.457 (11.61) Z 1.743 (44.27) 1.757 (44.63) Conformance inspection, part 2 A 5.375 (136.53) B 0.500 (12.70) E 3.125 (79.38)
24、H 2.500 (63.50) K 0.080 (2.03) 0.090 (2.29) L 59 48 60 12 M 2.869 (72.87) 2.881 (73.18) N 59 48 60 12 T 0.190 (4.83) 0.196 (4.98) U 2.745 (69.72) W 2.661 (67.59) X 1.172 (29.77) 1.212 (30.78) Y 0.432 (10.97) AB 0.859 (21.82) 0.891 (22.63) AF 2.922 (74.22) 3.047 (77.39) AG 3.219 (81.76) 3.281 (83.34)
25、 AH 2.969 (75.41) AJ 0.875 (22.23) 0.937 (23.80) AK 0.875 (22.23) 0.937 (23.80) AL 1.406 (35.71) 1.468 (37.29) Conformance inspection, part 3 (periodic check) AD 1.542 (39.17) 1.582 (40.18) AE 0.120 (3.05) 0.130 (3.30) Reference dimensions C 0.062 (1.57) D 1.344 (34.14) F 0.374 (9.50) G 1.344 (34.14
26、) P 1.687 (42.85) R 1.187 (30.15) S 1.245 (31.62) V 2.057 (52.25) AC 0.750 (19.05) FIGURE 1. Outline drawing of electron tube type 2J55 - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/297E 6Referenced documents. In addition to
27、MIL-PRF-1, this document references the following: MIL-STD-1311 MIL-DTL-3922/59 The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any
28、 inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custodians: Preparing activity: Army - CR DLA -CC Navy - EC Air Force
29、- 85 (Project 5960-2009-031) Review activities: Navy - AS, CG, OS, SH Air Force - 99 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
