1、 MIL-PRF-1/1542C 4 August 2009 _ SUPERSEDING MIL-PRF-1/1542B(USAF) 18 June 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, POWER TYPE 7402 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube describ
2、ed herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: High vacuum clipper diode or rectifier. Outline: See figure 1. Mounting: Vertical position, base down. Weight: 14.3 ounces nominal. ABSOLUTE RATINGS: Parameter: Unit: Ef V ac epx kv ib a Ib mA dc Ieff A ac Pp W
3、Clipper Maximum: Minimum: 12.1 10.9 33 - 50 - - - 1.25 - 450 - Rectifier Maximum: Minimum: 12.1 10.9 33 - 2.7 - 860 - - - 450 - Test condition: 11.5 - - - - - _ General: Qualification - Not required. AMSC N/A FSC 5960 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted wi
4、thout license from IHS-,-,-MIL-PRF-1/1542C 2 TABLE I. Testing and inspection. Inspection Method Condition Acceptance Level Symbol Limits Unit MIL-STD-1311 Min Max Conformance inspection, part 1 Filament current 1301 0.65 If 14.75 16.25 A ac Peak emission 1231 eb = 8.0 kv 0.65 is 30 - a Electrode cur
5、rent (anode) 1256 Eb = 330 V dc 0.65 Ib 860 - mA dc Operation of rectifiers 1353 epx = 33 kv; ib = 2.7 a Ib = 860 mA dc 1/ 0.65 - - - - Conformance inspection, part 2 Low-frequency vibration 1031 No voltages 6.5 - - - - Shock 1041 Hammer angle 25 - - - - - Operation - epx = 33 kv tp = 1 sec; Zo = 53
6、 ohms; Rs = 300 ohms (min); Prr = 340 R1 = 0 1/ 2/ - ib 50 - a Conformance inspection, part 3 Life test provisions - Group D; operation of rectifiers - t 500 - hr Life-test end points: Peak emission - 1231 - is 25 - a 1/ The tube shall operate for 2 minutes without arcing or signs of gas during a te
7、st interval not to exceed 5 minutes. 2/ The tube shall be operated as a clipper diode in a thyratron modulator. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1542C 3 FIGURE 1. Outline drawing of tube type 7402.Dimensions Inches Millimeter
8、s Ltr Min Max Min Max Conformance inspection, part 2 A 9.250 9.750 235.15 247.65 B - 3.625 - 92.07 C .594 .656 15.09 16.66 Conformance inspection, part 3 (periodic check) E .559 .573 14.20 14.60 F Base A-4-18 Reference dimensions D 1.00 25.40 Provided by IHSNot for ResaleNo reproduction or networkin
9、g permitted without license from IHS-,-,-MIL-PRF-1/1542C 4 Referenced documents. In addition to MIL-PRF-1, this document references the following: MIL-STD-1311 The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done
10、as a convenience only and the Government assumes no liability whatsoever for any 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 previo
11、us issue. Custodians: Preparing activity: Air Force - 85 DLA - CC DLA - CC Review activities: (Project 5960-2009-027) 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-,-,-
