DLA MIL-PRF-1 507H-2004 ELECTRON TUBE MAGNETRON PULSE TYPE 7452A.pdf

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1、INCH POUND MIL-PRF-1/507H 27 February 2004 SUPERSEDING MIL-PRF-1/507G 27 January 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, MAGNETRON, PULSE TYPE 7452A This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The requirements for acquiring the e

2、lectron tube described herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: 16.0 GHz fixed frequency, 85 kw peak power output, integral 2-symmetrical-lobe magnet, air cooled. OUTLINE AND DIMENSIONS: See figure 1 herein. Weight: 25 lbs., approx. ABSOLUTE RATINGS: (not

3、e 1) Parameter: Ef eb if(surge) tk Anode T VSWR Cathode (bushing)T Unit: V kv a sec C ratio C Maximum: 5.5 30 24 - - - +125 1.5:1 +200 Minimum: - - - (note 2, 3) - - - - - - (note 3) 180 - - - (note 4) - - - - - - (note 4) Parameter: Ib ib Pi pi Du tpc Pressurized (Output) Unit: mA dc a W kw - - - s

4、ec psia Maximum: 30 14 780 315 0.0028 0.6 45 Minimum: - - - 10 - - - - - - - - - - - - (note 5) 14.7 (notes 6, 7) TEST CONDITIONS: (Notes 8, 9) Parameter: Ef Ib VSWR Du tpc tfc trv F Unit: V mA dc ratio - - - sec sec sec GHz Maximum: 4.8 26 1.1:1 - - - 0.275 0.15 0.14 16.160 Minimum: - - - (note 2)

5、22 (note 2) - - - (notes 7, 10) 0.00215 0.225 - - - 0.09 15.840 MOUNTING POSITION: Vertical (note 9) INPUT CONNECTION: (See figure 1 herein) OUTPUT CONNECTION: Waveguide choke coupling flange, modified UG-541/U (See figure 1 herein) COOLING: Forced-air (See figure 1, note 14 herein) MAGNET ISOLATION

6、: (note 11) MOUNTING PROVISION: (See figure 1, note 20, herein). HANDLING-STRESS CAUTION: (note 12) GENERAL: Qualification: Not required. Preproduction sample approval: Required; (note 13) Dimensions: (See figure 1) Marking: (notes 14, 15) Packaging: (note 16) AMSC N/A FSC 5960 Provided by IHSNot fo

7、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/507H 2 TABLE I. Testing and inspection. * Requirement or test MIL-STD-1311 method Conditions Acceptance levels (see note 35) Symbol Limits Min Limits Max Units Conformance inspection, part 1 Visual-mechanical exam

8、ination Pressurizing Heater current Oscillation (1) Heater-cathode warm-up time Frequency Pulse characteristics Pulse voltage Average anode current Average power output Spectrum measurement: RF bandwidth Stability - - - 4003 4289 - - - 4303 - - - 4304 4306 - - - 4250 4308 4315 (note 17) See fig. 1 A

9、ir; 50 psia, min. Output assembly (note 18) Ef = 4.8 V tk=180 sec., (min.) (note 3) VSWR = 1.1:1 max. (notes 1, 2, 8) Ef = 4.8V tk = 180 sec (max.) Ef = 0.0V for test Anode T = +70 15C (notes 4, 19) (notes 20, 21) - - - Ib = 26 mA dc - - - VSWR = 1.5:1 (note 22) VSWR = 1.5:1 (note 23) - - - 0.65 0.6

10、5 0.65 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - If - - - - - - F - - - epy - - - Po BW MP - - - - - - 10.8 - - - - - - 15.840 - - - 22 - - - 150 - - - - - - - - - - - - 13.2 - - - - - - 16.160 - - - 26 - - - - - - 8 0.75 - - - - - - A - - - - - - GHz - - - kv - - - W MHz % Conform

11、ance inspection, part 2 High-frequency vibration: RF bandwidth Frequency pulling factor 1031 4308 4310 No voltages (note 24) VSWR = 1.5 Ib = 22-26 mA dc (Osc. (1) VSWR = 1.5:1, (note 25) 6.5 - - - 6.5 - - - BW F - - - - - - - - - - - - 8 25 - - - MHz MHz See notes at end of Table I. Provided by IHSN

12、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/507H 3 TABLE I. Testing and inspection - Continued. * Requirement or test MIL-STD-1311 method Conditions Acceptance levels (see note 35) Symbol Limits Min Limits Max Units Conformance inspection, part 2 -cont

13、inued. Frequency pushing factor 4311 (Osc.(1) VSWR = 1.1:1 (max.) Swept: 22 to 26 mA dc at 50 Hz rate 6.5 F - - - 3.5 MHz/mA Conformance inspection, part 3 Cycling life Life-test end-points (Osc. (1): Periodic check, (notes 28, 29, 30) Salt spray (corrosion) Humidity Shock Input capacitance Temperat

14、ure coefficient Low-pressure Low-temperature operation - - - (4.6.2) 1006 1011 1042 4266 4027 - - - 1026 Group D (Osc.(1) VSWR = 1.5:1, min. Cycle thru g/2 ea. 15 minutes of oscillation (note 26) Aver. power output Pulse voltage Fixed tuned frequency RF bandwidth Stability Freq. drift, (note 27) Nor

15、mal mounting. Test cond. A except G = 15 (peak) (note 31) Heater to anode (Osc. (1) VSWR = 1.1:1 Anode T = +55 to +85C (note 4) (Osc. (1) VSWR = 1.5:1 Pressure = 522 mmHg (note 32) Pre-test cooling = 60 minutes at -65C (Osc.(1); Stability test requirements; tk = 180 sec., max. (note 23) - - - - - -

16、- - - - - - - - - - - - - - - - - - - - - N Po epy F BW MP F - - - - - - - - - C F/C - - - MP 175 120 22 15.840 - - - - - - - - - - - - - - - - - - 10 - - - - - - - - - - - - - - - 26 16.160 8 1.0 2 - - - - - - - - - 20 0.75 - - - 2.0 cycles W kv GHz MHz % MHz/hr - - - - - - - - - pF MHz/C - - - % S

17、ee notes at end of Table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/507H 4 TABLE I. Testing and inspection - Continued. * Requirement or test MIL-STD-1311 Method Conditions Symbol Limits Min Limits Max Units Conformance inspection,

18、part 3 -continued. Frequency Air cooling - - - - - - (Osc.(1) (notes 4, 19, 33) (Osc.(1) TA = +25 C Pi = 624 W 10% Air flow = 40 cfm (note 34) F T 15.840 - - - 16.160 +70 GHz C NOTES: 1 Refer to MIL-PRF-1, section 3 definition of absolute ratings. 2 Prior to application of high voltage, the filament

19、 current applied should be between 10.8 and 13.2 amperes. The procedure should include, first, applying 4.8 volts for 180 seconds minimum to filament; then, upon application of anode voltage, the heater voltage should be reduced until the anode current is 26 mA dc. 3 The heater surge current should

20、not be allowed to exceed 24 rms amperes. 4 Refer to figure 1, notes 12 and 21 herein for temperature-measurement point. Temperature shall be measured after thermal equilibrium has been reached. 5 The characteristics of the applied pulse must be those which result in proper starting and oscillation.

21、The rate of pulse voltage rise, the percentage of pulse voltage ripple, and the rate of the pulse voltage fall are among the more important considerations. Negative post-pulse voltage oscillations may cause leakage current and noise. The established pulse characteristics (refer to Oscillation (1) pu

22、lse characteristics, herein) should be adhered to. 6 The gas used in pressurization shall provide insulating properties equal to or better than that of dry air at the pressure specified. 7 The waveguide must be pressurized at 14.7 psia, minimum, to prevent breakdown under matched conditions, VSWR =

23、1.1 maximum. Under mismatch conditions, VSWR = 1.5 maximum, the waveguide must be pressurized at 35 psia, minimum. 8 Unless otherwise specified for a particular test parameter (see testing program table herein), the cooling and pressurization requirements-data indicated herein shall be effective whe

24、rever applicable throughout the testing program. 9 The tube shall be mounted with the cathode vertical to within 15 deviation. 10 Output window shall be pressurized at 14.7 psia. 11 During handling, transportation, mounting, and use, care must be exercised to prevent demagnetization. Ferromagnetic m

25、aterials should not be brought within 8 inches of the tube magnet, except at the ends where the clearance may be 3 inches. Energized magnets must not at any time be permitted to be closer than 12 inches from the tube magnet. 12 Care should be exercised during all handling for installation, storage,

26、and use of the tube, to prevent greater shock or vibration than that of the values for which the tube is designed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/507H 5 NOTES - Continued. 13 Preproduction Sample Approval in lieu of Qualifi

27、cation: Approval of preproduction sample, based upon preproduction sample inspection, shall replace Qualification requirements of MIL-PRF-1. Preproduction Sample tests, testing, sampling, and approval criteria shall correspond directly with all pertinent requirements in the specification as normally

28、 applicable to qualification of product. a. Unless otherwise specified in the bid request or contract, preproduction tests will be performed after award of contract, at the manufacturers plant. Approval of the preproduction sample is required prior to initial delivery of units on the contract. The f

29、abrication of production units, prior to approval of the preproduction sample, shall be at the manufacturers risk. Unless otherwise specified in the bid request or contract, the specimens shall become the property of the government and, upon approval, shall serve as a reference standard for the cont

30、racting officer and government inspector. b. Requests for information regarding preproduction testing and approval of the product(s) covered herein should be referred to the Defense Supply Center Columbus, Code DSCC-VQE, P.O. Box 3990, Columbus, OH 43216-5000, vqe.chiefdla.mil. c. No Qualified Produ

31、cts List (QPL) entry will be undertaken for the product(s) covered herein as approval of design and performance of product will be based upon Preproduction Sample Approval. d. In no manner shall the above requirements for Preproduction Sample Approval be construed as affecting requirements for produ

32、ction acceptance inspection of the product(s) covered herein. 14 Tube-designation marking shall be in accordance with MIL-PRF-1. If any specification requirements waiver has been granted, the product-identification marking shall consist of the tube type-number only. 15 Tube identification and tube s

33、erial number shall be marked in the most practical and most readily discernible location on the tube, relative to its normal mounted position (see Note 9, above). 16 Unless otherwise specified in contract or order, each tube shall, as a minimum protection against moisture and moisture vapor be seale

34、d within a moisture-vaporproof barrier bag, or equivalent, normally acceptable under packaging requirements of MIL-DTL-75. Also each electron tube shall be furnished with a dust cover for protection of the output connector. 17 The Acceptance Level for the combined defectives for attributes in Confor

35、mance Inspection, Part 1, utilizes an accept on zero defect sampling plan in accordance with MIL-PRF-1, table III. 18 The tube shall be gasketed, and test made of the output assembly. The specified pressure shall be applied, and the tube immersed in water. The tube shall be rejected if evidence of c

36、ontinuous formation of air bubbles exists. 19 The frequency shall be within the limits specified when measured under the stipulated temperature condition(s) and in accordance with 4.9 (h) of MIL-STD-1311. 20 This test need be conducted under only one set of conditions within the limits presented for

37、 Oscillation(1) herein. a. The characteristics of the applied pulse must be those that result in proper starting and oscillation. The rate of pulse voltage rise, the percentage of pulse voltage ripple, and the rate of pulse voltage fall are among the more important considerations. Negative post puls

38、e voltage oscillation should be minimized to avoid leakage current and noise. Also, values of voltage and current fall time, spike, ripple, inverse voltage and post voltage oscillations should be minimized. b. In instances where the pulse shape departs appreciably from the rectangular, an equivalent

39、 rectangular pulse with minimum departure areas shall be used for determination of pulse width and peak pulse current. c. Any capacitance used in the viewing systems shall not exceed 6.0 pF. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/5

40、07H 6 NOTES - Continued 21 The pulse characteristics for Oscillation(1) test shall be as follows: Min Max Unit tpc 0.225 0.275 sec tfc - - - 0.15 sec trv 0.09 0.14 sec Ripple - - - 10 % Inverse voltage - - - 20 % Post pulse forward voltage - - - 5 % 22 The r-f bandwidth shall be within the limits sp

41、ecified when the specified VSWR is introduced in the load at a distance of approximately 0.25 meter from the magnetron, with the load phase adjusted for maximum spectrum degradation. 23 Stability shall be measured in terms of the average number of output pulses missing, expressed as a percentage of

42、the number of input pulses applied during the period of observation. Output rf pulses are considered to be “missing” if, due to any causes, the average rf. pulse energy, within a 1 percent frequency range of the normal operating frequency, is less than 70 percent of the energy level of a normal puls

43、e. The percentage of missing pulses shall not exceed the amount specified, when measured in the last 3 minutes of a test interval not to exceed 6 minutes. Observation shall be made at the load phase position corresponding to maximum instability. 24 After subjection to Vibration test, each tube shall

44、 meet requirements for rf spectrum and stability in accordance with Oscillation (1) testing requirements herein. 25 The pulling measurement test shall be made in a manner such that thermal effects do not contribute appreciable error. 26 One Life test cycle shall consist of operation under the condit

45、ions of Osc (1) testing, as follows: Ef Ib Period Volts mA dc Minutes 4.8 0 3 0 26 120 0 0 27 a. The input power to the heater shall be snapped on at the beginning of each Life test cycle with a surge current of 24 to 26 amperes RMS. b. The standing wave introducer shall be moved during the test so

46、that operation is obtained for load phase positions corresponding to maximum power output, minimum power output, maximum frequency, and minimum frequency. If automatically driven, the standing wave introducer shall be cycled continuously through a line length approximately one-half wavelength long a

47、t a maximum rate of four cycles per hour; if manually moved, the standing wave introducer shall be cycled through the four load phase positions corresponding to maximum power, minimum power, maximum frequency, and minimum frequency at least once during the specified life of the tube, spending approx

48、imately equal periods of time in each phase position. 27 This test shall be performed in such a manner as to exclude thermal effects. The frequency drift shall not exceed the amount specified when averaged over each eight hour period during the minimum specified life, except during the first 24 hour

49、s. The frequency drift during the first 24 hours shall not exceed 6.0 MHz per hour when averaged over each eight hour period. 28 For periodic tests, sample tubes are to be selected at random intervals so that during only twelve-month period a minimum of two tubes shall have been successfully tested. In the event of failure of one or more tubes in a sample, thes