DLA MIL-PRF-1 1572 B-2008 ELECTRON TUBE VIDICON TYPE 7290.pdf

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1、AMSC N/A FSC 5960 MIL-PRF-1/1572B 18 December 2008 SUPERSEDING MIL-E-1/1572A 13 September 1972 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, VIDICON TYPE 7290 The requirements for acquiring the electron tube described herein shall consist of this document and MIL-PRF-1. This specification is approv

2、ed for use by all Depart- ments and Agencies of the Department of Defense. DESCRIPTION: One-inch, for slow scan or delayed readout, magnetic focus and deflection. PIN CONNECTIONS AND DIMENSIONS: See figure 1. ABSOLUTE RATINGS: Parameter: (See note 1) Ef Esj Ec1 Ec2 Ec3 Unit: V V dc V dc V dc V dc Ma

3、ximum: 6.9 25 125 750 1,000 Minimum: 5.7 - 0 - - TEST CONDITIONS: 6.3 15 Adjust (see note 2)300 Adjust (See note 3) ABSOLUTE RATINGS: Parameter: (See note 1) Ehk FI T(Faceplate) tk I (Focus coil) Unit: V dc fc C sec mA dc Maximum: 10,-125 1,000 45 - - Minimum: - - 10 - -TEST CONDITIONS: - - 30 300 4

4、0 TEST PATTERN: See note 4. TEST RASTER: See note 5. TEST COMPONENTS: See note 6. GENERAL: Qualification Not Required. Holding period (t = 336 hours). INCH-POUND Inactive for new design after 5 December 1997 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH

5、S-,-,-MIL-PRF-1/1572B 2 TABLE I. Testing and conditions. Limits MIL-STD- 1311 method Requirement or test Conditions Acceptancelevel SymbolMin Max Unit 1331 First article inspection Direct-interelectrode capacitance Target to all - C 3.5 5.5 pF - - - - - - - - - - - - - - Conformance inspection, part

6、 1 Alignment horizontal Alignment vertical Cutoff Center resolution (1) Center resolution (2) Corner resolution Spurious signal Signal electrode voltage Maximum dark current Sensitivity (1) Sensitivity (2) Raster burn Maximum grid 2 current Residual signal See notes 7, 8, and 9 See notes 7, 8, and 9

7、 FI = 0.6 fc See notes 7, 8, and 13 FI = 0.6 fc See notes 4, 7, 8, and 10 See notes 4, 8, 16, 20, and 21 FI = 0.6 fc See notes 4, 7, 8, and 11 FI = 0.6 fc See notes 7, 9, 12, and 23 See notes 7, 8, 14, and 23 FI = 0 fc; Esi = 25 V See notes 7, 8, and 23 FI = 0.6 fc See notes 7, 8, 15, and 23 See not

8、es 7, 8, 16, and 21 Esj = 25 V; FI = 0 fc See notes 7, 8, 17, and 23 Esj = open, Ec1 = 0 V dc 0 V dc; Ec3 = 250 V dc See note 23 See note 19 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 - - Ec1 - - - - Esj DIsj Isj Isj - Ic2 Lag -30 -30 -45 600 600 350 - - - .04 .0005 - 1000

9、 - +30 +30 -100 - - - - 25 .0005 .08 .001 - - 20 mA dc mA dc V dc Lines Lines Lines - V dc A dc A dc A dc - A dc % See notes at end of table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1572B 3 TABLE I. Testing and conditions - Contin

10、ued. Limits MIL-STD- 1311 method Requirement or test Conditions Acceptancelevel Symbol Min Max Unit 1301 1105 - - 1136 Conformance inspection, part 2 Heater current Permanence of marking Life-test provisions Life-test end point: Maximum grid 2 current Container drop (periodic check) Group D See note

11、 18 t = 500 hours See note 22 6.5 - - - - If - - Ic2 - 540 - - 900 - 660 - - - - mA - - A dc - NOTES: 1. The symbols used in this specification, in addition to those in MIL-PRF-1, are defined as follows: Lag = Percentage of initial value of signal-output current remaining after a specified time peri

12、od following removal of illumination. Esj = Target voltage Isk = Signal-output current DIsj = dark current FI = Faceplate illumination T(Faceplate) = Temperature of faceplate I(Focus coil) = Focus coil current IsjT = Target current 2. Ec1 shall be adjusted until the beam current is just sufficient t

13、o discharge the photo-layer as observed by presence of detail in the highlights of the monitor. 3. Grids 3 and 4 are connected together internally. The voltage applied to these two elements shall be referred to as Ec3. Ec3 voltages apply with the use of Cleveland Electronics No. VF-115-4A focusing c

14、oil and Cleveland Electronics yoke MVVL 155-1, or equivalent, producing a field strength of approximately 40 gausses. Ec3 and optical focus shall alternately be adjusted to obtain best focus (sharpest lines). 4. EIA resolution chart, 1956, or equivalent, shall be placed on a transparent slide and sh

15、all be illuminated from the rear of the slide. 5. Standard EIA (RETMA) television scan shall be employed. The scan size shall be .500 x .375 inch. 6. Test components: (a) Deflection yoke: MVVL 155-1 Cleveland Electronics, or equivalent. (b) Focusing coil: VF-115-4A Cleveland Electronics, or equivale

16、nt. (c) Alignment coil: VA-132 Cleveland Electronics, or equivalent. (d) The above components are mounted as shown in figure 2. 7. The tube shall be tested in camera with associated monitors as shown in the block diagram of figure 3. 8. The alignment coil currents of each horizontal and vertical coi

17、l shall be adjusted until the center of the test pattern remains stationary as Ec3 is varied in and out of focus. The alignment coil currents shall be within the specified limits. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1572B 4 TABL

18、E I. Testing and conditions - Continued. 9. The following “back illuminated” test pattern shall be used when performing this test: 10. With Ec3 adjusted for balanced horizontal and vertical resolution, the resolution in the center of the pattern shall exceed the specified limit at 30 frames per seco

19、nd scan rate. 11. With Ec3 adjusted for balanced horizontal and vertical resolution, the resolution in the 4 corners of the pattern shall exceed the specified limit at 30 frames per second scan rate. 12. Using the spurious signal chart as described in note 9, consider the inner circle area as zone 1

20、 and the area within the rectangle excluding the inner circle as zone 2. The maximum size of any blemish, spot, or smudge and maximum allowable in any zone are as follows: Method I Method II Number allowed Measurement in inches using a monitor with 10 x 7 1/2-inch raster Number of raster lines Zone

21、1 Zone 2 Over .0312 Over 2 None None .0312 to .0156 2 to 1 1 3 Under .0156 1 See note A See note A NOTE A: Do not count spots .0156 and under unless concentration causes a smudge. 13. With test conditions as indicated, remove blanking voltage from grid 1 and adjust Ec1 until test pattern just disapp

22、ears as observed on monitor. 14. Adjust Esj to 25V at faceplate illumination of 1.0 foot candles. The displayed information should be identical to that at 15V except for signal level and white spots. Close the lens and overscan the target. There should be no black areas observable on the monitor. 15

23、. Adjust faceplate illumination to the specified value, and project on vidicon target. The lamp current of the light source shall be adjusted for a color temperature of 2,870K. Sensitivity is the target current these conditions minus dark current. (Scan rate 30 frames per second) 16. Sensitivity (2)

24、. With an exposure time of 1/25th of a second and a faceplate illumination of 1.25 foot candles, the signal output current shall exceed the value specified when scanned by a .500-inch by .375-inch raster at 60 cps horizontal and .167 cps vertical rate. TABLE I. Testing and conditions - Continued. Pr

25、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1572B 5 17. Raster burn test. (a) With conditions for .500 x .375 inch scan, completely overscan target and increase bias until complete target is discharged. (b) Set black level at the value wh

26、ere no part of the dark current signal is clipped. (c) Increase monitor bias until complete target is just visible. (d) Reject if raster burn is lighter than surrounding area. Reject for any permanent image burn. 18. Life-test conditions: (a) Adjustment for scan size is made by the use of a tube sim

27、ilar to the tube under test except that the tube has a phosphor screen with 300 V dc applied to the target. (b) With the scan size adjusted to approximately .500 x.375 inch (do not allow scanned area to touch target ring), faceplate temperature of 30C 5C, adjust Ec1 to obtain 0.5 mA dc of grid 2 cur

28、rent. Cover left half of faceplate (looking into tube face with key pin up) with black tape, and adjust target voltage (Esj) to 25 V with no light incident on the faceplate. (c) Adjust the incident illumination on the faceplate to 0.1 A dc target current (IsjT), (Light plus dark current). (d) The in

29、cident illumination shall be readjusted for specified target current within 24 hours after the tube has reached the specified operating temperature. 19. Residual signal. With the tube setup and exposed as described in note 16, the output signal amplitude during the second frame readout after exposur

30、e shall not exceed 20 percent of the signal amplitude during the first frame readout. 20. Center resolution (2). With the tube setup in equipment capable of obtaining a 6 second frametime and with Ec3 adjusted to obtain balanced horizontal and vertical resolution, the resolution in the center of the

31、 pattern shall exceed the specified limit. 21. The tube shall be tested in camera with associated monitors as shown in figure four (4). 22. This test is not required for first article approval. 23. This test to be performed at the conclusion of the holding period. Provided by IHSNot for ResaleNo rep

32、roduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1572B 6 NOTES: 1. Metric equivalents (to the nearest .01 mm) are for general information only and are based upon 1 inch = 25.4 mm. 2. These dimensions are for information only and are not required for inspection purposes. 3. Th

33、e acceptance level for the combined mechanical defectives in conformance inspection, part 1, shall be 1.0 percent. 4. Direction of incident light is into face end of tube. 5. Concentricity and camber of tube shall be determined by gauge shown on figure 2. 6. For pin alignment, use gauge GE8-2. 7. Ta

34、rget contract flange in form of metal ring and with diameter as specified for dim. E, may be located along tube axis in any part of, or all of, space between dashed lines. FIGURE 1. Outline drawing of electron tube type 7290 Dimensions Inches Millimeters Ltr Min Max Min Max First article inspection

35、D Base:-E8-11 (See note 6) Conformance inspection, Part 1 A 6.120 6.380 155.45 162.05 B .990 1.045 25.15 26.54 E 1.116 1.132 28.35 28.75 Nominal dimensions (See note 2) F .175 4.45 G .050 1.27 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1

36、/1572B 7 FIGURE 2. Test components for electron tube type 7290 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1572B 8 NOTES: 1. Video amplifier requirements: (a) Bandwidth (frequency response): Nominal response of video channels shall be f

37、lat within 3 dB TO 15 m. (b) Gain: Approximately 40 dB (Linearity shall be within 10). (c) Input signal: 0.5 VPP where black in negative. (d) Frequency distortion (amplitude and phase) shall not exceed 2.0 percent tilt at either vertical or horizontal rate. 2. Camera unit requirement: Both horizonta

38、l and vertical scanning linearity shall be within 1.0 percent. FIGURE 3. Block diagram of test equipment for electron tube type 7290 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1572B 9 NOTES: 1. Bandwidth (frequency response): Flat with

39、in 3 db to 2.5 MHz. 2. Vertical frequency 1/6 Hz. Horizontal frequency 60 Hz, 2 ms. Blanking internal. FIGURE 4. Block diagram of slow scan test equipment for electron tube type 7290 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1572B 10

40、Referenced documents. In addition to MIL-PRF-1, this document references MIL-STD-1311. The margins of this specification sheet are marked with vertical lines to indicate modifications generated by this amendment. This was done as a convenience only and the Government assumes no liability whatsoever

41、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. Custodians: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 85 (Project 5960-2008-075) DLA - C

42、C Review activities: Navy - AS, CG, MC Air Force - 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-,-,-