1、MIL-C-l8438B(SHIPS) AMENDMENT - 1 26 November 1962 MILITAR Y SPECIFICATION CHARGERS, BATTERY, GENERATOR TYPE This amendment forms a part of Military Specification MIL-C- 18438B (SHIPS), 14 June 1962. .Pages 1. and 2, paragraph 2.1: Under IISPECIFICATIONS, MILITARY“ add: “MIL-S-l9500/124 - Semiconduc
2、tor Diode, Silicon, 10-Watt, Voltage Regulator Types 1N2970B thru 1N3015B and lN2970RB thru 1N3015RB. If Pages 1 and 2, paragraph 2; 1: Under “STANDARDS, MILITARY“, add: tfMiL-STD-108 - Definitions of and Basic Requirements for Enclo- sures for Electric and Electronic Equipment. Page 5, table II: In
3、 column 3, opposite “Coils (Single Layer), (b) Class B insulation, Method 2“, delete 1170“ and substitute tf901t. Page 6, paragraph 3.2.16, last sentence: Delete “200 r.p.m. If and sub- stitute “140 percent“. Pages 8 and 9, paragraphs 3.2.18 through 3.2.21: Delete and substitute: “3.2.18 Electron tu
4、bes and semiconductor devices. - 113.2.18.1 The use of electron tubes will not be permitted. “3.2.18.2 Use of controlled rectifiers is permitted only when specifically . approved on an individual application basis by the bureau or agency con- cerned. ering them for use in a design. and Semiconductor
5、 Device Complement Report, as required by MIL-E-917, shall be submitted for bureau or agency approval, Approval of controlled rectifiers shall be obtained prior to consid- “3.2.18.3 Prior to ordering semiconductor devices, an Electron Tube “3.2.18.4 provided also, that special slection for temperatu
6、re coefficient of volt- age is not required. required by MIL-E-917 for nonstandard parts; in addition, they shall either be covered by an individual specification sheet or they shall comply with the requirements of an individual detail specifications listed in MIL-STD-701 for a similarly constructed
7、 device substituting characteristic values peculiar to the devices to be used. “3.2.18.6 Voltage regulator devices. - Voltage-regulator de.vices shall They shall comply with the requirements speci- Ail other devices shall require specific approval as Diodes shall be individually replaceable. _. be s
8、elected from MIL-STD-701 and supplied in accorgance with the require- ments of MIL-s- 19500 and applicable detail specifications thereunder as specified in MIL-STD-701. The temperature coefficient of- voltage is not a controlled characteristic; device usage which requires control of this charac- ter
9、istic shall require the device to be treated as a nonstandard part. Non- listed devices shall also be treated as nonstandard-parts, and shall require specific approval as required by MIL-E-917. shall either be covered by an individual detail specification, or they shalL - comply with the requirement
10、s of an individual detail specification listed in MIL-STD-701 for a similarly constructed device, except that the device manufacturers latest published commercial specification values applicable to the device (or approved values based on the commercial product) shall be substituted for th characteri
11、stic values contained in the applicable specifi- cation. Voltage regulator diodes shall be individually replaceable. Page 2 of 3 pages In addition, non-listed devices . - .- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-tIIL-C-Lq3B (1) bL 9 797990b
12、 0087339 b MIL-S- 18438B(SHIPS) AMENDMENT - 1 “3.2.18.7 Transistors. - Individual transistors shall be selected frm the silicon types in MIL-STD-701. All transistors shall be procured to the re- quirements of MIL-S-19500 and, where issued, to individual Military detail specifications under MIL-S- 19
13、500. If not specifically covered by such a de- tail specification, they shali comply with the inspection procedures of a detail specification listed in MIL-STD-701 for a similarly constructed device, ex- cept that the manufacturers latest commercial specificztion values applicable to the device (or
14、approved values based on the commercial product) shall be substituted for the characteristic values contained in the applicable detail specifications. MIL-E-917 for nonstandard parts. types shall apply for all transistors approved for use in this equipment. Transistors shall be individually replacea
15、ble. I All other types will require specific approval as required by The requirements specified for preferred Page 10, paragraph 3.2.24.5: Add “(as specified, see 6.1). Page 11 : Add as paragraph 3.3.3.1.1 (d) (1 0)h:- “(h) Location of the center of gravity in two views. Page 18, paragraph 4.5.4: De
16、lete all information after the first sentence and substitute “Acceptability of totally enclosed machines shall be determined by tests for spraytight enclosures as specified in MIL-STD-108. It Page 19, paragraph 4.5.12, line 7: Delete llhereintt and substitute llin 4.5.11“. Page 20, paragraph 4.5.18,
17、 first sentence: Delete “3.2.17.13“ and sub- stitute “3.2.17.14. II Page 21, paragraph 6.1: Add as items (p) and (9): “(p) Where grounded system is desired, specify whether negative or positive ground is required (see 3.2.4). “(9) Specify whether voltage regulator and current limiting elements desig
18、n should be static, vibrating contact, or carbon pile (see 3.2.24.5). If Pages 23 through 27, Appendix I: Delete. Preparing activity : Navy - Ships (Pro j e c t 6 1 3 O - NO 48 Sh) -q Page 3 of 3 pages Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
