1、AMSC N/A FSC 5960 MIL-PRF-1/590C 30 September 2009_ SUPERSEDING MIL-PRF-1/590B 9 February 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, CATHODE RAY TYPE 3FP7A This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the
2、 electron tube described herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Electrostatic deflection and focus. DIMENSIONS AND PIN CONNECTIONS: See figure 1. ABSOLUTE RATINGS: Parameter Ef Ec1 ed Eb1 Eb2 Eb3 Rg Zd Ehk Eb3/Eb2 Alt Unit: V V dc v V dc V dc V dc Meg M
3、eg V dc ratio ft Maximum 6.9 0 550 1,100 2,000 4,400 1.5 1.0 -125 2.3 10,000 Minimum 5.7 -125 - - 1,500 3,000 - - - - Test conditions: 6.3 Adj - Focus 2,000 4,000 - - - - GENERAL: Qualification - Required. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
4、e from IHS-,-,-MIL-PRF-1/590C 2 TABLE I. Testing and inspection. Inspection Method Notes Conditions Symbol Limits Units MIL-STD-1311 Min Max Qualification inspection Neck and bulb alignment (electrostatic types) 5101 - Dia. - 2.25 Inch Cathode illumination 5216 - - - - - Focusing voltage 5246 - Eb1
5、400 690 V dc Deflection factor (1D2) 5248 - Eb3=Eb2=2,000 V dc DF 170 230 V dc/in. Deflection factor (3D4) 5248 - Eb3=Eb2=2,000 V dc DF 126 170 V dc/in. Deflection factor uniformity 5248 - - - - - Direct-interelectrode capacitance 1331 - Control grid to all Cathode to all Cg1 Ck - - 10.5 10.5 pF pF
6、D1 to D2 C1D2 - 4.0 pFD3 to D4 C3D4 - 4.0 pFD1 to all CD1 - 15.0 pFD3 to all CD3 - 12.0 pFD1 to all, except D2 CD1 - 13.0 pFD2 to all, except D1 CD2 - 13.0 pFD3 to all, except D4 CD3 - 12.0 pFD4 to all, except D3 CD4 - 12.0 pFPressure (implosion) 1141 - - - - - Vibration 5111 - Width - 1.0 mm Base m
7、aterial insulating quality 1216 - - - - - Conformance inspection, part 1 Voltage breakdown 5201 - - - - - Voltage breakdown (electrostatic types) 5201 - - - - -Gas “cross” 5206 1 lb3=150 A dc - - - - Bulb, screen and faceplate quality 5106 - - - - -Modulation 5223 - lb3=150 A dc Ec - 50 V dc Spot po
8、sition (electrostatic deflection) 5231 - - - 12 mm Spot displacement (leakage) 5231 - Displ - 7 mm Grid cutoff voltage 5241 - Eco -30 -90 V dc Grid No 1. leakage current 5251 - - - - - Anode No. 2 leakage current 5251 - - - - - See footnotes at end of table. Provided by IHSNot for ResaleNo reproduct
9、ion or networking permitted without license from IHS-,-,-MIL-PRF-1/590C 3 TABLE I. Testing and inspection - Continued. Inspection Method Notes Conditions Symbol Limits Units MIL-STD-1311 Min Max Conformance inspection, part 2 Heater current 1301 - lf 540 660 mA Electrode current (anode 1) 5201 - Ec1
10、 = 0 lb1 -50 10 A dc Electrode current (cathode) 5201 - 1b3=150 A dc lk - 1,500 A dc Base alignment (electrostatic types) 5101 - + 1D2, pin No. 5 - - - - Side terminal alignment (electrostatic types) 5101 - +1D2 - - - - Angle between traces 5101 - - - - - Neck and base alignment (electrostatic types
11、) 5101 - - - - Stray light emission (conventional types) 5216 - Eb2=2,200 V dc Eb3=4,400 V dc - - - - Screens 5221 - - - - Line width “A” (electrostatic deflection) 5226 2 1b3=150 A dc Width - 0.75 mm Line width “B” (electrostatic deflection) 5226 3 1b3=150 A dc Width - 0.90 mm Focusing voltage at c
12、utoff 5246 - Eb1 460 690 V dc Deflection factor 5248 - 1D2 DF 212 288 V dc/in. Deflection factor 5248 - 3D4 DF 153 207 V dc/in. Heater-cathode leakage current 5251 - - - - - Secureness of base, cap or insert 1101 - - - - - Base pin solder depth 1111 - - - - - Permanence of marking 1105 - - - - - Con
13、formance inspection, part 3 Life test - - Group C; Eb3 = 4,400 V dc; Eb2=2,200 V dc; lb3-30 A dc t = 500 hours - - - - Life-test end points: Modulation 5223 - lb3=112 A dc Ec - 50 V dc Line width “A” 5226 - lb3=112 A dc Width - 0.8 mm Line width “B” 5226 - lb3=112 A dc Width - 0.95 mm Provided by IH
14、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/590C 4 TABLE I. Testing and inspection - Continued. NOTES: 1/ This test to be performed at the conclusion of the holding period. 2/ The deflecting plates shall be returned to anode number 2 through a minimu
15、m of 2.5 megohm resistors. lb3 the beam current shall be set at 150 A dc. The high-frequency scanning shall be applied to the deflecting plates nearest the screen and the amplitude shall be adjusted to give a line length of approximately 90 percent of the maximum tube diameter. The low-frequency sca
16、nning amplitude shall be expanded to approximately 90 percent of the maximum tube diameter in the direction perpendicular to the direction of high-frequency scanning. Readjustment may be made for best overall focus. a. The tubes shall be observed for deflection defocusing, astigmatism or spot ellipt
17、icity observable to the eye as evidenced by fuzziness due to lack of sharpness of trace (usually around edges) bow-tying (irregular widths of any single line when observed at different points) bowing of trace other than that normally caused by curvature of bulb. b. This test for focus is to be made
18、in addition to the line width measurements. 3/ The same conditions shall be set up as described in 2/ except that the connection of deflecting elements to the low- and high-frequency scanning supplies shall be interchanged and the amplitudes adjusted to 90 percent of the maximum tube diameter in bot
19、h directions without any adjustment of focus from note 2 conditions. An examination for defocusing, astigmatism or spot ellipticity shall be made as in note 2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/590C 5 NOTES: 1. Minimum useful
20、screen radius. 2. These dimensions are for information only and are not required for inspection purposes. FIGURE 1. Outline drawing for electron tube 3FP7A. Dimensions Ltr Inches Millimeter Min Max Min Max Conformance inspection, part 2 A 2.937 dia. 3.063 dia. 74.60 dia. 77.80 dia. B 1.375 34.93 C 1
21、937 dia. 2.063 dia. 49.20 dia. 52.40 dia. D 9.720 10.250 247.65 260.35 G 1.500 2.000 38.10 50.80 Reference dimensions (see note 2) E 9.250 234.95 F 3.875 98.43H 1.625 41.28 J 8.000 Rad 203.20 Rad K .250 Rad 6.35 Rad L 12.438 Rad 315.93 Rad Q .350 8.89 Provided by IHSNot for ResaleNo reproduction or
22、 networking permitted without license from IHS-,-,-MIL-PRF-1/590C 6 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
23、was done 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 la
24、st previous issue. Custodians: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 85 (Project 5960-2009-037) DLA - CC Review activities: Army - CR4 Navy - AS, CG, MC, OS, SH 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-,-,-
