1、AMSC N/A FSC 5960 MIL-PRF-1/374F 26 May 2009 SUPERSEDING MIL-PRF-1/374E 12 October 1998 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, KLYSTRON TYPE 2K48 This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The requirements for acquiring the electron
2、 tube described herein shall consist of this specification sheet and MIL-PRF-1. DESCRIPTION: Reflex, external cavity. ABSOLUTE RATINGS: Parameter: Ef Cavity voltage Ik Er T Alt Unit: V V dc mA dc V dc C ft Maximum: 6.6 1,500 15 -400 120 50,000 Minimum: 6.0 - - - - - - -18 - - - - - - PHYSICAL CHARAC
3、TERISTICS: See figure 1. Mounting position: Any. TEST CONDITIONS: Parameter: Ef Cavity voltage Er Unit: V V dc V dc 6.3 1,250 Adjust _ GENERAL: Qualification Not Required. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/374F 2TAB
4、LE I. Testing and inspection. Inspection Method MIL-STD-1311 Notes Conditions Symbol Limits Min Limits Max Unit First Article inspection Nonoperation vibration 1031 2 10 G - - - - - - - - - - - - Conformance inspection, part 1 Heater current Total reflector current Voltage breakdown Electrode curren
5、t (cathode) Power output (1) Power output (2) Power output (3) Cathode emission 4289 4229 - - - 1256 4250 4250 4250 4214 8 - 5 3 - 4 4 4 7 Er = -400 V dc; t = 30 seconds Er = -350 V dc Cavity I: Er = -20 to -50 V dc; F = 4,300 to 4,450 MHz Cavity II: Er = -65 to -110 V dc; F = 6,900 to 7,200 MHz Cav
6、ity II: Er = -175 to -235 V dc; F = 6,900 to 7,200 MHz Cavity III: Er = -240 to -300 V dc; F = 10,550 to 10,850 MHz Ef = 5.7 V If Ir - - - Ik Po Po Po Po Po/Po 0.45 - - - 8 5 5 20 20 - - - 0.70 10 - - - 15 - - - - - - - - - - - - 15 A A - - - mA dc mW mW mW mW % Conformance inspection, part 2 Low-fr
7、equency vibration Bump High-altitude voltage breakdown 1031 1036 - - - 2 1 6 2.5 G Angle = 25 - - - - - - Ik - - - - - - - - - - - - - - - 5 - - - - - - A Conformance inspection, part 3 Life test Life-test end points: Power output (3) - - - - - - 4250 4 Group C t Po 250 10 - - - - - - hrs mW See not
8、es at end of Table I. TABLE I. Testing and inspection - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/374F 3NOTES: 1. The tube shall be suspended by a yoke clamped to the cavity center conductor centered at a point 2.375 (60.33
9、 mm) inches from the end of the center conductor. The weight of the yoke shall be 0.25 pound (113.4 g) and the portion of the yoke against which the hammer strikes shall have a spherical radius 1 (25.4 mm) inch. 2. The tube shall be within the limits of all power output tests after vibration. 3. A 2
10、5,000-ohm resistor shall be placed in series with the repeller lead and 4,000 peak ac volts shall be applied between the cavity center conductor and the repeller lead. No breakdown as indicated on a high-resistance ac voltmeter in parallel with the tube shall occur. 4. Each tube shall be tested to a
11、ssure satisfactory operation under the following conditions: Cavity I, II, and III, in accordance with Drawing 181-JAN. The power output shall maximize between the specified repeller voltage limits and shall be above the limits specified. The tube shall deliver power over a repeller voltage range of
12、 10 V. The tube shall be assumed satisfactory without a test at 10 V from a maximum power repeller voltage between -30 V and 0 V. 5. A 15-Meg resistor shall be placed in series with the repeller lead. 6. Apply 2,000 V dc through a 15-Meg protective resistor in series with a 50 A full scale meter shu
13、nted by a momentary push button switch, as shown in circuit diagram below. Current shall be read with tube at standard atmospheric pressure. The same measurement shall then be made at a pressure of 81.28 mm of mercury, care being taken not to depress the shorting button across the microammeter if an
14、y initial deflection exists. The increase in current shall not exceed 5 A over that read at atmospheric pressure, 1 minute after application of full voltage. 7. Power output (1), test cavity I, limits shall be used. 8. This specification sheet uses accept on zero defect sampling in accordance with M
15、IL-PRF-1, table III. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/374F 4Dimensions in inches with metric equivalents (mm) in parentheses Ltr Minimum Maximum Conformance inspection, part 1 (See Table 1, note 8) Inch Millimeter Inch Millim
16、eter C .005 (0.13) .008 (0.20) F 1.125 (28.58) 1.145 (29.08) J .538 (13.67) .543 (13.79) N .065 (1.65) Conformance inspection, part 2 A 7.38 (187.45) B 1.56 (39.62) 1.94 (49.28) D 4.88 (123.95) 5.00 (127.00) M 4.06 (103.12) 4.16 (105.66) P .25 (6.35) .34 (8.64) Conformance inspection, part 3 E .735
17、18.67) H .245 (6.22) .255 (6.48) Reference dimensions G .450 (11.43) K .281 (7.14) L .380 (9.65) Q .406 (10.31) NOTES: 1. Shall be gold plated min 10 MSI or silver plated 15 MSI external surfaces. 2. Contact portion of disc measured radially which must be free from splits or tears, must be smooth a
18、nd flat. 3. Plate cavity center conductor gold 10 MSI or 15 MSI. 4. The tube shall be capable of being inserted in concentric cylinder (see figure 2) without binding (equivalent gauging method may be used). 5. Pee Wee 3 Pin Base (A3-108 or equivalent). FIGURE 1. Outline drawing of electron tube type
19、 2K48. SEE NOTE 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/374F 5Inches mm .0085 0.22 .188 4.78 .250 6.35 .312 7.92 .5435 13.80 .580 14.73 .900 22.86 1.000 25.40 1.160 29.46 2.125 53.98 4.341 110.26 FIGURE 2. Test cylinder. Reference
20、d documents. In addition to MIL-PRF-1, this document references the following: MIL-STD-1311 JETEC DWG 181-JAN 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 only and the Government assumes n
21、o 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. Custodians: Preparing activity: Army CR
22、DLA - CC Navy EC Air Force 85 (Project 5960-2009-002) DLA CC Review activities: Navy AS, CG, MC, OS Air Force 19, 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-,-,-
