1、 MIL-PRF-1/1426E 27 July 2009 _ SUPERSEDING MIL-PRF-1/1426D 18 June 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, THYRATRON TYPE 8354 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube described
2、herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Triode, hydrogen, ceramic-metal. See figure 1. Mounting position: Any. Weight: 2 pounds (907.2 grams) nominal. ABSOLUTE RATINGS: Parameter: Ef epy epx Ebb egy egx Ecc ib Ib Unit: V ac kv kv V dc v v V dc a A dc Max
3、imum: Minimum: 6.8 5.8 25 - 25 1/ 5% epy - 1,500 1,500 2/ 500 400 - -200 - 1,000 - 2.2 - Test conditions: 8/ 6.3 25 - - 450 - - - - ABSOLUTE RATINGS: Parameter: Ip tj prr dik/dt Pb tk TA Cooling Eres Unit: A ac s - a/s - sec C - V ac Maximum: Minimum: 40 - 0.005 - 4,000 - 5,000 - 25 x 1097/ - 300 +8
4、5 -55 - 7/ - 6.8 5.8 Test conditions: 8/ - - - - - 300 Ambient - 6.3 See footnotes at end of table I. _ GENERAL: Qualification Required. AMSC N/A FSC 5960 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1426E 2 TABLE I. Testing a
5、nd inspection. Inspection Method Notes Condition Symbol Limits Unit MIL-STD-1311 Min Max Conformance inspection, part 1 Pulse emission 3251 - ik = 1,500 a; tp = 5 s 10 percent; prr = 60 10 percent; tr = 0.5 s (max); specified time interval = 2.5 s egk - 250 v Heater current (cathode) 3241 - If 11 18
6、 A ac Heater current (reservoir) 3241 - Ires 3 8 A ac Operation (1) 3246 3/ 4/ 5/ Ef = Eres = 5.8 V ac; epy = 24 kv; Ib = 2.2 A dc; t = 1 hour egy - 450 v Operation (2) 3246 10/ Operation (1), except Ef = Eres = 6.3 V ac; t = 5 hours egy - 450 v Instantaneous starting 3267 3/ 6/ epy = 18 kv (min); E
7、f = Eres = 6.8 V ac - - - - DC anode voltage for conduction 3247 - Ef = Eres = 5.8 V ac Ebb - 1,000 V dc Conformance inspection, part 2 Anode delay time 3256 - Operation (1), except t = 120 seconds tad - 0.5 s Anode delay time drift 3256 9/ Anode delay time tad - 0.15 s Time jitter 3261 12/ Operatio
8、n (2); tk = 300 seconds tj - 0.005 s Conformance inspection, part 3 Sweep-frequency vibration 1031 11/ No voltages applied - - - - Shock 1041 11/ 250 G; no voltages applied - - - - Shock and sweep- frequency vibration end points - - DC anode voltage for conduction Ebb - 1,250 V dc Life test - 3/ Gro
9、up C; t = 500 hours - - - - Life test end points: - - - - - - Operation (1) and (2) 3246 - Except 5/ egy - 450 v DC anode voltage 3247 13/ Ebb - 1,250 V dc Time jitter 3261 - tj - 0.005 s See footnotes at top of next page. Provided by IHSNot for ResaleNo reproduction or networking permitted without
10、license from IHS-,-,-MIL-PRF-1/1426E 3 TABLE I. Testing and inspection - Continued. 1/ In pulsed operation, the peak inverse voltage exclusive of a spike of 0.05 s maximum duration, shall not exceed 5 kv during the first 25 s following the anode pulse. 2/ The driver pulse, measured at the tube socke
11、t with the thyratron grid disconnected: tr = 0.35 s maximum; grid pulse duration = 2 s minimum. The impedance of the drive circuit shall be 50 to 200 ohms. 3/ The anode circuit constants shall be chosen for a resonant charging condition of prr = 4,000 minimum. At epy = 24 kv and ib = 580 a minimum,
12、the rate of rise of the current pulse (dik/dt) shall be 5,000 a/s minimum. The pulse width (tp) shall be 2.4 s 10 percent. The grid pulse measurements at the tube socket with the thyratron grid disconnected shall be as follows: tr = 0.35 s minimum, tp = 2.0 s maximum, Zg = 200 ohms minimum, Ecc = -7
13、0 V minimum. 4/ The anode temperature and grid seal temperature shall not exceed 350C at any time during this test. 5/ Anode voltage shall be applied as specified in 6/. Full anode voltage (epy = 24 kv) shall be reached within 5 seconds after starting. The tube shall operate at the specified anode v
14、oltage for a total of 6 hours, which may include two interruptions during the initial 30 minutes and one interruption during the last 5.5 hours. 6/ The tube shall operate satisfactorily on push button starting within two attempts when the anode voltage (epy) is applied to the tube under test in such
15、 a manner as to rise from 0 to 18 kv minimum within 0.03 second. (The filter in the rectifier shall be designed so that epy reaches at least 9 kv within 0.015 second). Any tube failing to start within three attempts will be considered a failure. 7/ There shall be no artificial anode or envelope cool
16、ing directed onto the tube. Blowers or anode radiators shall not be used. 8/ The heat dissipater, Hughes Aircraft Co. Part No. 529033 (grid radiator), or equivalent shall be used during all tests of this specification. 9/ This test shall be performed simultaneously with operation (1) test. Anode del
17、ay time measurement shall be made at the end of 2, 4, and 30 minutes of the operation (1) tests. The anode delay time drift (tad) measurement is the numerical difference between 2 minute and 4 minute, or 2 minute and 30 minute anode delay time readings, whichever is greater. 10/ Operation (2) shall
18、be a continuation of operation (1) with the specified change in operating conditions made after 1 hour. 11/ This test shall be performed during the initial production and once each succeeding 12-calendar months in which there is production. A regular double sampling plan shall be used, with the firs
19、t sample of three tubes with an acceptance number of zero, and a second sample of three tubes with a combined acceptance number of two. In the event of failure, the test will be made as part of conformance inspection, part 2, code level D, with an acceptance level of 6.5. The regular “12-calendar mo
20、nth” double sampling plan shall be reinstated after three consecutive samples have been accepted. 12/ The tube shall be tested by applying a peak forward anode voltage, as specified in the test conditions for the time jitter test immediately after the tk. The tj shall be not greater than the amount
21、specified after 120 seconds of operation. 13/ The tube shall operate at the specified anode voltage for a total of 6 hours which may include three interruptions during the initial 30 minutes and three interruptions during the last 5.5 hours. Provided by IHSNot for ResaleNo reproduction or networking
22、 permitted without license from IHS-,-,-MIL-PRF-1/1426E 4 FIGURE 1. Outline drawing of tube type 8354. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1426E 5 Dimensions Ltr Inches Millimeters Min Max Min Max Conformance inspection, part 1
23、K .100 .180 2.54 4.57 N 2.985 3.015 75.82 76.58 Conformance inspection, part 2 A - 5.895 - 149.73 B 3.945 4.340 100.20 110.24 C - 1.555 - 39.50 D 2.985 3.015 75.82 76.58 E 2.410 2.530 61.21 64.26 F - .313 - 7.95 G .980 1.355 24.89 34.42 H .093 - 2.36 - J .520 .570 13.21 14.48 M - .375 - 9.53 P 3.235
24、 3.265 82.17 82.93 R 3.245 3.305 82.42 83.95 S - 1.081 - 27.46 W - .469 - 11.91 X - 3.430 - 87.12 Reference dimensions T 135 U 90 V 1.500 38.10 NOTES: 1. Reservoir and heater terminals shall be identified and marked on tube base as specified herein. 2. Cathode ring connection. 3. Other side of reser
25、voir and heater terminals are internally connected and are common to cathode. FIGURE 1. Outline dimensions of tube type 8354 - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1426E 6 Referenced documents. In addition to MIL-PRF-1
26、, this document references the following: MIL-STD-1311 Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes. Custodians: Preparing activity: Army - CR DLA - CC Navy EC DLA - CC (Project 5960-2009-021) Review activiti
27、es: Army - MI Navy - AS, CG, MC, OS, SH 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-,-,-
