1、 MIL-PRF-1/1147C 4 August 2009 _ SUPERSEDING MIL-PRF-1/1147B 29 June 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, MICROWAVE NOISE SOURCE TYPE 6782 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron t
2、ube described herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Gaseous discharge diode, S band. 12/ Cathode: Filamentary type. Dimensions: In accordance with outline drawing (see figure 3). Base: Miniature Bi-pin, in accordance with outline drawing (see figure 3)
3、. Mounting position: Any. ABSOLUTE RATINGS: Parameter: If Ib Epp TA T Bulb Unit: ma mA dc V ac C C Maximum: - - - +85 +125 Minimum: - - 2,000 -55 - Test conditions: 0 250 - - - See footnotes at end of table I. _ GENERAL: The Preproduction sample approval requirements in CECOM Drawing SC-A-46600 here
4、by replace any qualification requirements existing in or otherwise referable to the data in this specification sheet. Qualification Not required. 13/ 14/ Holding Period 168 hours. AMSC N/A FSC 5960 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
5、HS-,-,-MIL-PRF-1/1147C 2 TABLE I. Testing and inspection. Inspection Method Conditions Symbol Limits Unit MIL-STD-1311 Min Max First Article Variable frequency 1031 13/ 14/ No voltages applied 10/ - - - - Electrode voltage 1261 If-1 = 170 mA dc If-2 = 170 mA dc Ef-1 Ef-2 - - 15.0 15.0 V dc V dc Volt
6、age drop 3337 Forward and reverse 1/ 2/ Etd-a Etd-b 41 41 48 48 V dc V dc Ionization 3347 Rp = 8,000 ohms 3/ Ez - 2,000 V ac Noise figure 4260 F = 3,300 MHz 3/ 4/ 5/ 7/ 11/ Nr-1 8.60 9.10 dB Noise test 3278 F = 3,300 MHz 3/ 4/ 5/ 7/ 11/ Nr-1 8.60 9.10 dB Match (1) 4256 F = 3,270 MHz 4/ 6/ Ib = 250 m
7、A dc VSWR 1.30:1 1.38:1 - Match (2) 4256 F = 3,270 MHz 4/ 6/ Ib = 0 mA dc VSWR - 1.02:1 - Life test - Epp = 2,000 V ac Rp = 8,000 ohms 3/ 8/ 9/ (One minute on, two minutes off) No. 2,500 - Cycles Life test end points: Noise figure Ionization - 4260 3347 11/ Nr-1 Ez 8.55 - 9.15 2,000 dB V ac 1/ The t
8、ube shall be tested in the circuit shown in figure 1 or equivalent. 2/ In the test circuits on figure 1, with a filament current of 170 mA dc, the tube shall operate within three tries. The tube shall be tested and then reverse tested using alternate ends as anode and cathode. One reading of Etd sha
9、ll be taken not less than 15 seconds after ionization, in each direction. 3/ The tube shall be tested in total darkness. 4/ The test shall be made with the tube mounted in the Noise Tube Mount (see figure 4) of this specification. Termination shall be made by a matched RG-48/U termination, having a
10、minimum VSWR of 1.01:1 such as Hewlett-Packard S-914A, or equivalent. 5/ The frequency specified is that of the local oscillator. 6/ The frequency specified is that of the signal generator. 7/ Excess noise ratio shall be measured by comparison with an approved standard. The excess noise ratio measur
11、ement tests shall be made using the test circuit of figure 2 or equivalent. The VSWR, looking into the balanced mixer, shall not be greater than 2:1. The excess noise ratio measurement tests shall be made, using the test circuit of figure 2 or equivalent. The VSWR, looking into the balanced mixer, s
12、hall not be greater than 2:1. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1147C 3 TABLE I. Testing and inspection - Continued. 8/ The tube shall be tested at an ambient temperature of +85C. 9/ Life test samples shall consist of one tube
13、 per lot. A lot shall consist of one weeks production. No lot shall be shipped until the completion of life test. Failure of initial samples shall require a successful life test of two additional tubes before release of a lot for shipment. 10/ Life test end points shall apply. 11/ The excess noise r
14、atio (Nr -1) is defined in dB, as Nr - 1 = 10 log (Te2901) where Te is the effective electron temperature. 12/ The noise frequencies generated by this tube cover a broad band of frequencies. This bandwidth is limited only by the type of mount used. This tube is normally used with a mount in RG-48/U
15、waveguide, at a 90 angle in the H plane. Other waveguide sizes may be used with properly adapted mounts. 13/ Qualification inspection and first article testing should be in accordance with Appendix E and F of MIL-PRF-1. The request for qualification inspection shall be addressed to: Defense Supply C
16、enter Columbus, CODE VQE, 3990 East Broad Street, Columbus, Oh 43216-5000 14/ Electron tube type 6782 acquired directly or indirectly on Army contracts, shall be marked “US Army“ either above or preceding the type designation as specified in the bid request or contract. The letters “JAN“ or any abbr
17、eviation thereof shall not be used. NOTICE: When Government drawings, specifications, or other data are used for any purpose other than in connection with a definitely related Government acquisition operation, the United States Government thereby incurs no responsibility nor any obligation whatsoeve
18、r; and the fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data is not to be regarded by implication or otherwise as in any manner licensing the holder or any other person or corporation, or conveying any rights or permissio
19、n to manufacture, use, or sell any patented invention that may be in any way related thereto. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1147C 4 FIGURE 1. DC test circuit. FIGURE 2. Test circuit for excess noise measurements. Provided
20、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1147C 5 NOTES: 1. All dimensions are in inches, with metric equivalent. 2. Tubes must pass through gauge .585 DIA and 9 inches long. 3. Planes of pins to be approximately parallel on both ends of tube.
21、 4. Includes solder and wire. 5. Outer circle indicates maximum excursion of pin including variations in center to center spacing, pin diameter and tilt. Reference dimension is center to center of .140 inch diameter circles. FIGURE 3. Electron tube, type 6782 (noise source). Dimensions Ltr Inches Mi
22、llimeters Min Max Min Max A 8.187 8.594 207.95 218.29 B 5.750 - 146.05 - C - .875 - 22.23 D .555 DIA .565 DIA 14.10 DIA 14.35 DIA E .260 .325 6.60 8.26 F .550 DIA .560 DIA 13.97 DIA 14.22 DIA G .135 DIA .145 DIA 3.43 DIA 3.68 DIA H .187 REF 4.75 REF J .090 DIA .105 DIA 2.29 DIA 2.67 DIA Provided by
23、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1147C 6 NOTES: 1. All dimensions are on the next page. 2. Sides shall be parallel within .002 inch total indicator reading. FIGURE 4. Mount for electron tube, type 6782 (noise source). Provided by IHSNot
24、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1147C 7 Dimensions Ltr Inches Millimeters Min Max Min Max A 5.3115 5.3135 134.912 134.963 B 1.483 1.487 37.67 37.77 C .7415 .7435 18.834 18.885 D 1.123 1.127 28.52 28.63 E .5615 .5635 14.262 14.313 F 45 45 G 22.
25、5 22.5 H .0625 x 45 1.588 x 45 J 1.419 1.421 36.04 36.09 K 2.838 2.842 72.09 72.19 L 7.3115 7.3125 185.712 185.763 M .325 .335 8.26 8.51 N 1.905 1.907 48.39 48.44 P .623 DIA .627 DIA 15.82 DIA 15.93 DIA Q .740 DIA .745 DIA 18.80 DIA 18.92 DIA FIGURE 4. Mount for electron tube, type 6782 (noise sourc
26、e) - Continued. Referenced documents. In addition to MIL-PRF-1, this document references the following: MIL-STD-1311 CECOM Drawing SC-A-46600 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 o
27、nly 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 previous issue. Custodia
28、n: Preparing activity: Army - CR DLA - CC DLA - CC (Project 5960-2009-029) Review activities: Army - MI 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-,-,-
