DLA MIL-PRF-1 1361 H-2012 ELECTRON TUBE THYRATRON TYPES 7390 AND 7390A.pdf

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1、 MIL-PRF-1/1361H 12 June 2012 SUPERSEDING MIL-PRF-1/1361G 1 December 2005 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, THYRATRON TYPES 7390 AND 7390A This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tub

2、e described herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Triode, hydrogen, ceramic-metal. See figures 1 and 1A. Mounting position: Vertical, base down. Weight: 9 pounds (4.1 kilograms) nominal. ABSOLUTE RATINGS: Parameter: Ef epy epx Ebb egy egx Ecc ib Ib Ip

3、Unit: V ac kv kv kV dc v v V dc a A dc A ac Maximum: 6.6 3.3 1/ 33 2/ - 3/ 650 - 2,000 4.0 72 Minimum: 6.0 7 5% epy 3.5 - - - - - - Test conditions: 6.3 3.3 - - 1,100 - 0 - - - ABSOLUTE RATINGS: Parameter: tj prr dikdtPb tk TA Cooling Eres Ires Unit: s - as- sec C - V ac A ac Maximum: 0.01 - 10,000

4、30x109 5/ +75 6/ 5.5 8/ 12 Minimum: - - - - 900 -55 - 3.5 - Test conditions: - 465 - - 900 - 7/ 9/ - See footnotes at end of table I. _ GENERAL: Qualification: Required. This specification sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III. AMSC N/A FSC 5960 INCH-POUND

5、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1361H 2 TABLE I. Testing and inspection. Inspection Method Notes Conditions Symbol Limits Unit MIL-STD-1311 Min Max Qualification inspection Operation at elevated ambient temperature 3246 7/

6、10/ 12/ TA = 75C, except t = 5 hours egy - 1,100 v Life test (2) - 7/ 13/ 14/ epy = 25 kv; prr = 740; Ib = 4.0 A dc (min); egy = 1,200 v; Zg = 50 ohms (min); t = 500 hours - - - - Life-test (2) end points: Operation (1) DC anode voltage for conduction (1) Time jitter - 3246 3247 3261 - - - Zg = 50 o

7、hms (min) egy = 1,200 v; Zg = 50 ohms (min) egy = 1,200 v; Zg = 50 ohms (min) egy Ebb tj - - - 1,200 3,000 0.01 v V dc s Conformance inspection, part 1 Heater current (cathode) 3241 - If 22 35 A ac Heater current (reservoir) 3241 - Eres = 4.5 V ac Ires 7 10.0 A ac DC anode voltage for conduction (1)

8、 3247 15/ Eres = 105 percent of optimum value Ebb - 2,500 V dc Instantaneous starting 3267 7/ 10/ 16/ Eres = 105 percent of optimum reservoir voltage; epy = 24 kv (min) - - - - Operation (1) 3246 7/ 10/ 11/ 17/ 18/ epy = 36 kv; t = 1 hour egy - 1,100 v Operation of optimum reservoir voltage 3246 - O

9、peration (1) Eres 3.5 5.5 V ac Pulse emission (method A) 3251 20/ ik = 2,000 a; tp = 5.0 s 10 percent; prr = 60 10 percent; tr = 0.5 s (max) egk - 300 v See footnotes at end of table. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1361H 3

10、TABLE I. Testing and inspection - Continued. Inspection Method Notes Conditions Symbol Limits Unit MIL-STD-1311 Min Max Conformance inspection, part 2 Vibration - 24/ MIL-STD-202, method 201 - - - - Shock, specified pulse 1042 4/ 24/ - - - - DC anode voltage for conduction (2) 3247 21/ Eres = 95 per

11、cent of optimum value Ebb - 2,500 V dc Operation (1A) 3246 7/ 18/ 19/ 22/ Operation (1) egy - 1,100 v Operation (2) 3246 7/ 13/ 17/ 18/ epy = 25 kv; t = 1 hour; prr = 740; Ib = 4.0 A (min) egy - 1,100 v Operation (2A) 3246 7/ 18/ 22/ Operation (2) egy - 1,100 v Anode delay time 3256 - Operation (1A)

12、; t = 2 minutes tad - 1.0 s Anode delay time drift 3256 23/ Anode delay time tad - 0.1 s Time jitter 3261 - Operation (1A), except epy = 7.0 kv; tj measured after 60 minutes of operation tj - 0.01 s Conformance inspection, part 3 Life test - 7/ 10/ 14/ Group C; epy = 1,200 v; Zg = 50 ohms (min); t =

13、 500 hours - - - - Life-test end points: Operation (1) DC anode voltage for conduction (1) Time jitter - 3246 3247 3261 - - - Zg = 50 ohms (min) egy = 1,200 v; Zg = 50 ohms (min) egy = 1,200 v; Zg = 50 ohms (min) egy Ebb tj - - - 1,200 3,000 0.01 v V dc s See footnotes at top of next page. Provided

14、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1361H 4 TABLE I. Testing and inspection - Continued. 1/ Instantaneous starting is not recommended. When it is necessary, the maximum permissible epy is 22 kv and it shall not be attained in less than 0

15、.04 second. 2/ In pulsed operation, the peak inverse voltage shall not exceed 5.0 kv during the first 25 s following the pulse. 3/ The driver pulse, measured at the tube socket with thyratron grid disconnected: 1,300 volts minimum; 2,500 volts maximum; tr = 0.35 s maximum; grid pulse duration 2.0 s

16、minimum. Impedance of drive circuit 10 to 25 ohms. 4/ Shock tests shall be performed in accordance with MIL-STD-202, method 213, except as noted. The tube shall be mounted on suitable rigid fixtures in the positions described below by means of its mounting flange. The tube shall not be clamped, brac

17、ed, or supported by means other than its mounting flange. The tube shall be subjected to three blows in each of the following positions: Position of tube in elevator assembly Intensity and duration of blow Vertical: Base down 80 G, 11 ms, half-sine shock pulse Horizontal: Center line through heater

18、terminals, vertical 60 G, 11 ms, half-sine shock pulse Horizontal: Center line through heater terminals, horizontal 60 G, 11 ms, half-sine shock pulse The tests shall be performed with both heater and reservoir at substantially full operation temperatures. Means for detecting heater current variatio

19、ns and shorts between anode and grid and between grid and cathode shall be provided. No temporary or permanent changes in heater or reservoir currents or temporary or permanent shorts between electrodes shall occur. 5/ Standby operation, with heater and reservoir voltage on, is not recommended. Wher

20、e standby operation is necessary, provisions shall be made to operate the tube at full equipment conditions for a minimum of 2 hours during each 12-hour period of standby. 6/ Maintain grid seal temperature within 225C above ambient temperature by blower directed at seal and lower ceramic cylinder. A

21、pproximately 15 cfm of air is required at rated power levels. 7/ Approximately 15 cfm of air may be directed at grid seal and lower envelope. 8/ The optimum reservoir voltage for operation in accordance with operation (1) conditions is inscribed on the base of the tube and must be held within 2.5 pe

22、rcent. Applications involving other operation conditions will necessitate the re-determination of the optimum reservoir voltage. 9/ Adjust reservoir voltage to value indicated on the tube within 5 percent, except as otherwise specified. 10/ The anode circuit constants shall be chosen so that at epy

23、= 33.0 kv; under resonant charging conditions; ib = 2,000a minimum; dik/dt shall be 10,000a/s minimum; tp = 2.5 10 percent s; prr = 500 minimum. Grid pulse measured at tube socket with thyratron grid disconnected: tr = 0.35 s minimum, tp = 2.0 s maximum; internal impedance of driver: 75 ohms minimum

24、. 11/ This test is to be the first test performed at the conclusion of the instantaneous starting test. 12/ The tube shall be capable of operating under the following conditions: a. Apply cathode heater voltage and adjust reservoir voltage to 95 percent of the optimum reservoir voltage and allow bot

25、h to warmup for 15 minutes. b. Raise anode voltage directly to the specified voltage at a rate of not less than 30 kv per minute. c. The tube shall operate at the specified anode voltage for a total of 2 hours which may include one interruption. A total of four interruptions at any anode voltage is

26、permitted provided that the total test time required to perform this part of the operation test does not exceed 135 minutes. d. After the above operation is at full anode voltage, increase the reservoir to 105 percent of the optimum value. The tube shall continue to operate for an additional 2 hours

27、 with not more than one interruption. e. After the above operation at full anode voltage, decrease the reservoir voltage to optimum value. The tube shall continue to operate for an additional hour without interruption. Provided by IHSNot for ResaleNo reproduction or networking permitted without lice

28、nse from IHS-,-,-MIL-PRF-1/1361H 5 TABLE I. Testing and inspection - Continued. 13/ The anode circuit constants shall be chosen so that at epy = 25.0 kv under resonant charging conditions; ib = 1,000 a minimum; rate of rise of dik/dt shall be 5,000 a/s minimum; tp = 5.0 10 percent s; prr = 500 minim

29、um. Grid pulse measured at tube socket with thyratron grid disconnected: tr = 0.35 s minimum; tp = 2.0 s maximum; internal impedance of driver: 75 ohms minimum. 14/ During every 96-hour period, the life test shall be shut off for a minimum of 30 minutes. 15/ This test shall be conducted within 60 se

30、conds after the operation (1) test. 16/ The tube shall operate satisfactorily on push-button starting within three attempts when the epy is applied to the tube under test in such a manner as to rise from 0 to 24 kv minimum within 0.04 second. (The filter in the rectifier shall be designed so that th

31、e epy reaches at least 9.0 kv within 0.015 second.) Any tube failing to start within three attempts will be considered a failure. 17/ The tube shall be capable of operating under the following conditions: a. Apply cathode heater voltage and adjust reservoir voltage to 105 percent of the optimum valu

32、e and allow both cathode and reservoir to warmup for 15 minutes. b. Raise anode voltage directly to the specified voltage at the rate of not less than 30 kv per minute. c. The tube shall operate at the specified anode voltage for a total of 60 minutes which may include one interruption. A total of s

33、ix interruptions at any anode voltage is permitted provided that the total test time required to perform the operation test does not exceed 120 minutes. 18/ No anode or grid voltage other than that required for an instantaneous start test shall have been applied to the tube for a minimum period of 2

34、 hours prior to this test. 19/ Type 7390A only. a. The temperature indicator shall be such that a green field is visible in the indicator window when the tube is operating properly within its ratings and a red field indicated when conditions exist that produce deleterious anode hearing. b. During op

35、eration (1A), the thermometer shall indicate the green background throughout the test, and the dividing line between the green and red zones shall be at least .188 inch (4.77 mm) to the right of the pointer at the center of the windows. c. Any external forced-air cooling of the tube shall be directe

36、d on the tube in such a manner that it will not affect the calibration of the temperature indicator. 20/ Measure the voltage between grid and cathode not more than 2.5 s maximum after the beginning of the current pulse. The average voltage shall not rise during the last 4.0 s. 21/ This test shall be

37、 conducted within 60 seconds after the operation (1A) test. 22/ The tube shall be capable of operating at the following conditions: a. Apply cathode heater voltage and adjust reservoir voltage to 95 percent of the optimum reservoir voltage and allow both to warmup for 15 minutes. b. Raise anode volt

38、age directly to the specified voltage at a rate of not less than 30 kv per minute. c. The tube shall operate at the specified anode voltage for a total of 60 minutes which may include one interruption. A total of six interruptions at any anode voltage is permitted provided that the total test time r

39、equired to perform the operation test does not exceed 120 minutes. 23/ During the interval between 2 and 60 minutes of the anode delay time test, the tad relative to the tad value observed on the anode delay time shall not exceed the specified value. 24/ Tube shall be vibrated as described for 2 hou

40、rs each in the vertical direction, in the horizontal direction parallel to the heater connections, and in the horizontal direction perpendicular to the heater connections. After shock and vibration tests, the tube shall meet all the conformance inspection, part 1 and part 2, test requirements except

41、 the provisions of 19/. An aging period not to exceed 1 hour is permitted after mechanical tests. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1361H 6 FIGURE 1. Outline drawing of electron tube type 7390. Provided by IHSNot for ResaleNo

42、reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1361H 7 FIGURE 1A. Outline drawing of electron tube type 7390A. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1361H 8 Dimensions Ltr Inches Millimeters Min Max Mi

43、n Max Conformance inspection, part 2 A 8.000 10.500 203.20 266.70 B - 5.625 - 142.88 D 9.500 10.500 241.30 266.70 E 5.938 6.063 150.83 154.00 F 5.324 5.364 135.23 136.25 U - 2.500 - 63.50 V - 1.500 - 38.10 Conformance inspection, part 3 (see note 10) C - 3.000 - 76.20 G .307 .323 7.80 8.20 J 3.750 5

44、.750 95.25 146.05 K - .500 - 12.70 L 4.375 4.625 111.13 117.48 M - .375 - 9.53 N .875 1.875 22.23 47.63 P 1.000 2.000 25.40 50.80 X - 4.563 - 115.90 Reference dimensions H 8930 9030 8930 9030 R 5,000 CM (see notes 3, 4, and 5) S 10,000 CM (see notes 3, 4, 5, and 6) T .125 3.18 NOTES: 1. Anode termin

45、al shall be .25-20UNC-2A roundhead machine screw .50 inch (12.7 mm) long with washer .250 inch (6.35 mm) clearance diameter and .50 inch (12.7 mm) outside diameter. 2. Grid terminal shall be 6-32UNC-2A roundhead machine screw .50 inch (12.7 mm) long with washer, .188 inch (4.77 mm) inside diameter a

46、nd .375 inch (9.53 mm) outside diameter, and with 6-32UNC-2B hex nut. 3. Lead terminals shall be in accordance with figure 2. 4. Insulation sleeving shall be as specified in MIL-I-3190. 5. Leads shall be flexible. Dimensions S and R define cross sectional area of lead conductors. Lead connections sh

47、all be suitably identified. Lead connections, lead identification, lead insulation, and lead insulation sleeving shall be inspected under qualification and shall be as follows: Lead insulation Lead Color Type Sleeving color H (heater) Yellow HA-1 Other than black HR (heater-reservoir) Yellow HA-1 Bl

48、ack R (reservoir) Red HA-1 Other than black 6. Heater leads, 2 mounting holes as applicable, and grid terminals shall be aligned within 10. 7. Dimension C and X defines extent of rigid portion of tube below mounting flange. Clearance for this part of tube shall be provided in equipment. 8. Holes G shall be inspect