1、 Comments, suggestions or questions on this document should be addressed to DLA Land and Maritime, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to CircuitProtectdla.mil. Since contact information can change, you may want to verify the currency of this address information usin
2、g the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 5855 MIL-O-52374E 10 January 2013 SUPERSEDING MIL-O-52374D 7 November 2006 MILITARY SPECIFICATION INACTIVE FOR NEW DESIGN after 5 October 1990 OSCILLATOR: HIGH VOLTAGE GENERAL SPECIFICATION FOR This specification is approved for use
3、 by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for a transistorized, high-voltage, oscillator. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this sp
4、ecification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requir
5、ements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless other
6、wise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-1/1049 - Electron Tube, Image Converter, Type 6914. MIL-PRF-27 - Transformers and Inductors (Audio, Power, and High-Power Pulse), General Specification for. MIL
7、-PRF-19500 - Semiconductor Devices, General Specification for. MIL-PRF-23586 - Sealing Compound (with Accelerator), Silicone Rubber, Electrical. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374E 2 MIL-PRF-39003 - Capacitors, Fix
8、ed, Electrolytic (Solid Electrolyte), Tantalum, Established Reliability, General Specification for. MIL-PRF-39014 - Capacitor, Fixed, Ceramic Dielectric (General Purpose), Established Reliability and Non-Established Reliability, General Specification for. MIL-PRF-39017 - Resistors, Fixed, Film (insu
9、lated), Nonestablished Reliability, and Established Reliability, General Specification for. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Marking of U.S. Military Property. MIL-STD-202 - Electronic and Electrical Component Parts. MIL-STD-889 - Dissimilar Metals. MIL-STD-1916 - DoD Pre
10、ferred Methods for Acceptance of Product. DEPARTMENT OF DEFENSE HANDBOOKS MIL-HDBK-781 - Reliability Test Methods, Plans, and Environments for Engineering Development, Qualification and Production. (Copies of these documents are available online at https:/assist.dla.mil/quicksearch/ or https:/assist
11、.dla.mil/ or from DLA Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following document forms a part of this document to the extent specified herein. Unless otherwise specified, the issues of this document are that cited in the
12、 solicitation or contract. SOCIETY OF AUTOMOTIVE ENGINEERS SAE-AMS-QQ-N-290 - Nickel Plating (Electrodeposited). (Copies of this document is available online at http:/www.sae.org/ or from the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence
13、. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Description. Th
14、e high-voltage oscillator, hereinafter called the oscillator, shall be a solid-state, electronic device for converting 6.75 volts dc (V dc) input to 2,700 volt ac peak-to-peak output at a frequency of 1.2 to 2.0 kilohertz (kHz) and shall conform to figure 1 and as specified herein. Provided by IHSNo
15、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374E 3 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Permanently mark terminal information as shown. 4. Permanently mark identification, serial number, cont
16、ract number. 5. Socket to hold .038 diameter, .090 LG PIN, with a 4 ounce minimum pull. 6. Socket to be flush with insulator. 7. Socket to be solid (as opposed to slotted). 8. Exposed metal housing to be nickel plated and shall be the negative contact. FIGURE 1 High voltage oscillator. Ltr Inches Mi
17、llimeters Min Max Min Max A D E F G H J K L .038 .932 .370 .182 .985 .120 .039 .010 .307 .043 .942 .380 .192 1.015 .130 .041 .100 .317 0.97 23.55 9.40 4.62 25.31 3.05 0.99 0.25 7.80 1.09 23.67 9.65 4.88 25.78 3.30 1.04 2.54 8.05 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
18、thout license from IHS-,-,-MIL-O-52374E 4 3.2 First article. Unless otherwise specified in the contract or purchase order, samples shall be subjected to first article inspection (see 4.2 and 6.4). 3.3 Materials and components. Materials and components shall be as specified herein. Materials and comp
19、onents not specified shall be selected by the contractor and shall be subject to all provisions of this specification. 3.3.1 Insulating material. The interior circuitry of the oscillator shall be encapsulated in sealing compound conforming to MIL-PRF-23586. 3.3.2 Housing material. Housing material s
20、hall be copper-flashed steel and shall be nickel plated in accordance with type III, class 1 of SAE-AMS-QQ-N-290. 3.3.3 Components. 3.3.3.1 Resistors. Resistors shall conform to MIL-PRF-39017 or equivalent resistors which meet the requirements of this specification. 3.3.3.2 Capacitors. Tantalum capa
21、citors shall conform to MIL-PRF-39003. Ceramic capacitors shall conform to MIL-PRF-39014. 3.3.3.3 Semiconductors. Transistors and diodes shall conform to MIL-PRF-19500. 3.3.3.4 Transformers. Transformers shall conform to MIL-PRF-27. 3.3.4 Lead materials and finishes. Lead or terminal material and fi
22、nishes shall be used that enables the oscillator to meet all of the requirements of this specification. For further guidance on lead finishes (see 6.5.) 3.3.5 Metals All metals used in the construction of the oscillators covered by this specification shall be corrosion resistant or protectively trea
23、ted to resist corrosion in consonance with the performance requirements specified herein. When dissimilar metals are used in contact with each other, protection against electrolysis and corrosion shall be provided. Metal plating or metal spraying of dissimilar base metals to provide similar or suita
24、ble abutting surfaces is permitted. Dissimilar metals are defined in MIL-STD-889. 3.3.6 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceed
25、s the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.4 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of (product) and solder shall not exceed 97 percent, by mass. Tin sh
26、all be alloyed with a minimum of 3 percent lead, by mass (see 6.5). 3.5 Dimensions and weight. 3.5.1 Dimensions. Dimensions shall be as shown on figure 1 and as specified herein. 3.5.2 Weight. The oscillator shall not exceed 1.75 ounces total weight. 3.6 Burn-in. Each oscillator shall be operated wi
27、th an input of 6.75 V dc for 100 hours. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374E 5 3.7 Normal operation. With an input current of 20 milliamperes (mA) maximum and instantaneous peaks not greater than 60 mA, the oscillator shall no
28、t be damaged, (see 6.3.1) and shall meet the specified output voltages of table I under all conditions specified in table I. TABLE I. Output voltages. DC input voltage DC output load Total capacitance of output load performance in picofarads (pF) AC output voltage volts peak-to-peak 6.75 No load (se
29、e 6.3.2) 25 2,700 100 6.75 No load 15 2,700 100 6.75 Full load (see 6.3.3) 55 2,700 +100 -150 6.75 Overload (see 6.3.4) 25 2,700 +100 -200 6.00 Full load 55 2,700 +100 -150 3.8 Environmental temperature. The oscillator shall not be damaged by storage, operation, thermal shock or humidity and shall m
30、eet specified operational requirements under the following conditions (see figure 2). a. Storage At +68C for 2 hours and at -54C for 2 hours. b. Operation With an input current of 20 mA maximum and instantaneous peaks not greater than 60 mA, an output frequency of 1.2 to 2.0 kHz and at temperatures
31、from +52C to -54C with atmospheric pressures from 30 to 20 inches of mercury and under all load and input conditions specified in TABLE I. c. Thermal shock From +52C to room temperature (see 6.3.5) and from -54C to room temperature. d. Humidity A 90 to 98 percent relative humidity at temperatures fr
32、om +30C to +50C (see figure 3). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374E 6 FIGURE 2 Environmental cycle H.V. oscillator. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374
33、E 7 FIGURE 3. Relative humidity test cycles. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374E 8 3.9 Shock. While operating with 6.75 V dc input, no load on the output and a total capacitive load of 25 pF, the oscillator shall not be damag
34、ed and shall produce an output voltage of 2,700 volts peak-to-peak 100 volts when subjected to six 100g (see 6.3.6) shocks applied to each of three mutually perpendicular directions. The shock impacts shall be nominal half sine wave pulses having a minimum of 100 gs at peak amplitude. The duration o
35、f each shock pulse shall be 6 milliseconds 2 milliseconds measured between the 10 percent values of the peak amplitude. The energy under the shock curve shall be not less than 0.25 g-second and the after oscillations shall be not greater than 15 percent of the peak amplitude of the nominal half sine
36、 wave pulse. 3.10 Vibration. The oscillator shall not be damaged and shall meet the requirements of 4.4.6 after being rigidly mounted, singly or in groups, and vibrated with simple harmonic motion in three mutually perpendicular planes over a frequency range of 10 to 55 Hz with an amplitude of .10 i
37、nch total excursion for 10 minutes in each plane. There shall be no voltage applied to the oscillator during the vibration. 3.11 Rise time. The oscillator shall start and reach steady state (see 6.3.7) conditions within 5 seconds under the following conditions. a. An input voltage of 6.00 V dc and 6
38、.75 V dc. b. Full load. c. A total capacitive load of 55 pF. d. At an ambient temperature between +52C and -54C. 3.12 Noise level. The oscillator noise shall be not greater than 40 decibels when measured at a maximum distance of one inch from the oscillator while operating. (Reference level for nois
39、e measurements: 1,000 Hz sound wave having an intensity of 20 micronewtons per square meter.) 3.13 Stray field. With an input voltage of 6.75 V dc, and the output at full load and 55 pF, the oscillator stray field (see 6.3.8) shall be not greater than one gauss when measured at a maximum distance of
40、 one half inch from the oscillator. 3.14 Operation safety. a. The oscillator, with open circuit, shall not be damaged when subjected to a reverse polarity input voltage of 6.75 V dc for 1 minute: (1) Short circuited (see 6.3.9) for 1 minute. (2) Open circuited (see 6.3.10) for 5 minutes. (3) Full lo
41、ad for 1 hour. 3.15 High voltage output socket. The high voltage output socket of the oscillator shall not be damaged when tested in accordance with 4.4.11. 3.16 Mean time between failure. The oscillators shall exhibit a specified mean time between failure (MTFB) of 4,000 hours. 3.17 Identification
42、markings. The oscillator shall be identified in accordance with MIL-STD-130 and as shown in figure 1. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374E 9 3.18 Workmanship. The oscillator shall be free of burrs, sharp edges, chips, blisters
43、, corrosion, scratches, mars, or other defects. The oscillator shall be free of grease, oil, dirt, dust, flux or other foreign material. The processes of fabrication and testing shall not deteriorate the characteristics or oscillator performance, material or appearance. 4. VERIFICATION 4.1 Classific
44、ation of inspection. Inspection shall be classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 First article inspection. First article inspection shall be performed on sample units which have been produced with equipment and procedures normally used i
45、n production. The manufacturer shall provide verification to the acquiring activity that the first article inspection has been performed on the samples supplied to the requirements of this specification. 4.2.1 Sample size. Ten oscillators, high voltage, shall be subjected to first article inspection
46、. 4.2.2 Inspection routine. The samples shall be subjected to the inspections as specified in table II and table III. 4.2.3 Failure. One or more failures of first article examination or tests shall be cause for rejection. TABLE II. Examination. Defect Requirement paragraph Material not as specified
47、3.3 Dimensions not as specified 3.5.1 Weight not as specified 3.5.2 Identification marking not as specified 3.17 Workmanship not as specified 3.18 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-O-52374E 10 TABLE III. Test schedule. Test Requirem
48、ent paragraph Test paragraph Burn-in 3.6 4.4.2 Normal operation 3.7 4.4.3 Rise time 3.11 4.4.7 Operational safety 3.14 4.4.10 Noise level 3.12 4.4.8 Stray field 3.13 4.4.9 Environmental temperature 3.8 4.4.4 Shock 3.9 4.4.5 Vibration 3.10 4.4.6 High voltage output socket 3.15 4.4.11 Mean time betwee
49、n failure 3.16 4.4.12 4.3 Conformance inspection. 4.3.1 Inspection lot. Unless otherwise specified in the contract or purchase order, for purposes of inspection a lot shall be as defined in MIL-STD-1916. 4.3.2 Sampling. Samples shall be selected in accordance with MIL-STD-1916. Verification Level (VL) shall
