1、 MIL-PRF-1/1239F 19 January 2012 SUPERSEDING MIL-PRF-1/1239E 2 July 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, POWER TYPES 6816 AND 6884 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube desc
2、ribed herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Tetrode, UHF, ceramic-metal. Outline: See figure 1. Mounting position: Any. Weight: 2 ounces (56.7 grams) nominal. ABSOLUTE RATINGS: F1 = 1,215 MHz Parameter: Ef Eb Ec1 Ec2 Ib Ic1 Pg2 Pp Pi T(seal) tk Unit: V
3、 1/ V dc V dc V dc mA dc mA dc W W W C 2/ sec (min) Type AB Audio: AB SSBSC: C Telep: C Teleg: 6816 6884 6816 6884 6816 6884 6816 6884 6.3 10 % 26.5 10 % 6.3 10 % 26.5 10 % 6.3 10 % 26.5 10 % 6.3 10 % 26.5 10 % 1,000 1,000 1,000 1,000 800 800 1,000 1,000 - - - - -100 -100 -100 -100 300 300 300 300 3
4、00 300 300 300 180 180 250 250 3/ 150 150 180 180 30 30 30 30 30 30 30 30 4.5 4.5 4.5 4.5 3.0 3.0 4.5 4.5 115 115 115 115 75 75 115 115 180 180 180 180 120 120 180 180 250 250 250 250 250 250 250 250 60 60 60 60 60 60 60 60 Test conditions: 6816 6884 6.3 26.5 1,000 1,000 Adjust Adjust 300 300 - - -
5、- - - - - - - - - 60 60 See footnotes at end of table I. _ GENERAL: Qualification: Not 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 Provided by IHSNot for ResaleNo reproduction or networking permitted wit
6、hout license from IHS-,-,-MIL-PRF-1/1239F 2 TABLE I. Testing and inspection. Inspection Method Notes Condition Symbol Limits Unit MIL-STD-1311 Min Max Conformance inspection, part 1 Total grid current 1266 6/ Ec1/Ib = 115 mA dc Ic1 - -8 A dc Electrode current (screen) 1256 - Ec1/Ib = 115 mA dc Ic2 -
7、8.0 2.0 mA dc Electrode voltage (1) (grid) 1261 - Ec1/Ib = 115 mA dc Ec1 -6 -15 V dc Electrode voltage (2) (grid) 1261 - Ec1/Ib = 1.0 mA dc Ec1 - -48 V dc Pulsing emission 1231 7/ etd/ik = 10 a etd - 300 v Conformance inspection, part 2 Heater current 1301 - - Type 6816 Ef only Type 6884 Ef only If
8、If 1.84 0.48 2.26 0.60 A A Primary grid emission (control) 1266 - Eg1/g1 input = 2 W; t = 30; anode and g2 grounded Isg1 - -2 A dc Primary grid emission (screen) 1266 - Eg2/g2 input = 4.5 W; t = 30; anode and g1 grounded Isg2 - -3 A dc Interelement leakage resistance, cold 1366 5/ Supply voltage = 2
9、00 V dc R 1.0 - Meg Power output 2214 4/ F = 400 20 MHz; Ib = 180 mA dc (max); Ic1 = 30 mA dc (max); t = 120; Pd = 3.3 W (max); Type 6816 Ef = 5.7 V Type 6884 Ef = 24.0 V Po 80 - W (useful) Power oscillation 1236 - F = 15 MHz; Eb = 850 V dc; Ec2 = 300 V dc (max); Ib = 150 mA dc; Rg1 = 4,000 ohms (ma
10、x); Ic1 = 30 mA dc; Pg2 = 4.5 W (max); t = 120 Po 80 - W (useful) Current division (method A) 1372 - Eb = 350 V dc; Ec1 = -100 V dc; egk/ib = 0.6 a; prr = 10 to 12; tp = 4,500 to 5,000 s egk ic1 ic2 -3.0 0 10 +17 130 70 v ma ma Electrode current (positive grid) 1256 - Ec1 = +2 V dc; anode and g2 flo
11、ating; no other voltages except Ef Ic1 6 - mA dc Direct-interelectrode capacitance 1331 - Use capacitance fixture in accordance with 289-JAN Cg1k Cg1g2 Cg2p Cg1p Cpk Cg2k 11.0 15.0 4.2 - - 0.20 15.0 20.0 5.2 0.065 0.013 0.45 pF pF pF pF pF pF See footnotes at end of table. Provided by IHSNot for Res
12、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1239F 3 TABLE I. Testing and inspection - Continued. Inspection Method Notes Condition Symbol Limits Unit MIL-STD-1311 Min Max Conformance inspection, part 3 Life test - 6/ Group C; Ib = 180 mA dc; F = 400 20 MHz; Ic1
13、= 30 mA dc (max); Ec1 = value obtained for Ec1 in electrode voltage (2) test in accordance with part 1 herein; Type 6816 Ef = 5.7 V Type 6884 Ef = 24.0 V t 500 - hours Life-test end points: Pulsing emission Primary grid emission (control) Primary grid emission (screen) Power output - 2214 1266 1266
14、2214 - - - - etd/ik = 7.5 a etd Isg1 Isg2 Po - - - 70 400 -4.0 -4.0 - v A dc A dc W (useful) Heater-cycling life test 1506 - Group C; accelerated heater-cycling 2.5 minutes “on“, 5 minutes “off“ Type 6816 Ef = 8.5 V Type 6884 Ef = 35.0 V - 384 - Cycles Heater-cycling life-test end point: Heater curr
15、ent Type 6816 Type 6884 - 1301 - If If 1.5 0.4 2.7 0.7 A A Low-frequency vibration 1031 8/ Ec2 = 250 V dc; Ec1/Ib = 10 mA dc; Rp = 2,000 ohms; Ebb = 300 V dc Ep - 300 mV ac High-frequency vibration 1031 8/ No voltages - - - - Shock 1042 8/ Test condition A - - - - Vibration and shock-test end points
16、: Total grid current Electrode voltage (1) (grid) - 1266 1261 6/ - Ec1/Ib = 115 mA dc Ec1/Ib = 115 mA dc Ic1 Ec1 - -6 -8 -15 A dc V dc See footnotes at top of next page. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1239F 4 TABLE I. Testi
17、ng and inspection - Continued. 1/ Because the cathode is subjected to considerable back bombardment as the frequency is increased, with resultant increase in temperature, the heater voltage shall be decreased depending on operating conditions and frequency to prevent overheating the cathode and resu
18、ltant short life. 2/ Unless otherwise specified, sufficient cooling shall be supplied to maintain anode core and seal temperatures below the maximum rating. 3/ The maximum dc anode current at the peak of the current curve is 250 mA dc for a signal having a minimum peak-to-average power ratio of 2.0.
19、 The maximum rating for a signal having a minimum peak-to-average power ratio of less than 2.0, such as is obtained in single-tone operation, is 180 mA dc. During short periods of circuit adjustment under single-tone conditions, the average anode current may also reach the level of 250 mA dc. 4/ Tub
20、e shall be tested in a grid-driven amplifier circuit. Adjust Ec1 bias supply and tune circuit for maximum useful power output. The specified driver power (Pd) output shall be measured with a Bird Thru-line Wattmeter, or equivalent. Driving power output equals forward power minus reflected power. Gri
21、d voltage supply shall have an effective impedance of 500 ohms maximum. 5/ Before subjection to this test, the tube shall be cooled (room ambient temperature) for 30 minutes. Using the test circuit shown on the figure of method 1366, measure the resistance, in both directions, between any two adjace
22、nt electrodes (except across the heater terminals). If the resistance value is below that required, repeat this test after a 10-minute interval. If the tube fails again, the tube shall be rejected. 6/ Cooling shall be set up to maintain the tube temperature at the hottest point on the tube envelope
23、at 225C 25C. (This setup should be permanent and needs to be verified only as often as required to maintain equipment accuracy.) 7/ With anode, grid 1, and grid 2 tied together, apply a pulse voltage source between anode and cathode. Adjust the pulse amplitude until the specified peak cathode curren
24、t is obtained. Test shall be made at the end of 1 minute or when stability is reached, whichever occurs first. The pulse voltage shall meet the following requirements: a. Pulse duration: 2 s. b. Pulse repetition rate: 60 Hz. c. Duty factor: 0.00012. 8/ This test shall be performed during the initial
25、 production and once each succeeding 12-calendar months in which there is production. A regular double sampling plan shall be used, with the first sample of three tubes with an acceptance number of zero, and a second sample of three tubes with a combined acceptance number of one. In the event of fai
26、lure, the test will be made as a part of conformance inspection, part 2, code level D, with an acceptance level of 6.5. The regular “12-calendar month“ double sampling plan shall be reinstated after three consecutive samples have been accepted. Provided by IHSNot for ResaleNo reproduction or network
27、ing permitted without license from IHS-,-,-MIL-PRF-1/1239F 5 G1: Grid 1 terminal (adjacent to cathode and heater terminal). G2: Grid 2 terminal (adjacent to anode contact surface). P: Anode-terminal contact surface (adjacent to radiator). H: Heater terminals (cup at cathode end and cathode terminal)
28、. K: Cathode terminal (end opposite radiator). FIGURE 1. Outline drawing of electron tube types 6816 and 6884. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1239F 6 Dimensions Ltr Inches Millimeters Notes Min Max Min Max Conformance inspe
29、ction, part 1 4, 14 N 1.085 - 27.56 - P .985 - 25.02 - Q .735 - 18.67 - R .480 - 12.19 - T .240 .260 6.10 6.60 Conformance inspection, part 2 A 1.830 1.930 46.48 49.02 B 1.235 1.265 31.37 32.13 Conformance inspection, part 3 15 C 1.000 1.060 25.40 26.92 D 1.090 1.180 27.69 29.97 E .165 - 4.19 - F .3
30、50 .390 8.89 9.91 G .140 - 3.56 - H .160 .190 4.06 4.83 J .120 - 3.05 - K .095 - 2.41 - L .100 - 2.54 - M - .050 - 1.27 S - .072 - 1.83 U .054 - 1.37 - V .200 - 5.08 - W .035 - 0.89 - X .050 - 1.27 - Y .060 - 1.52 - Z .090 - 2.29 - AA .600 - 15.24 - BB - - - - 12 CC - - - - 13 FIGURE 1. Outline draw
31、ing of electron tube types 6816 and 6884 - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1239F 7 NOTES: 1. Metric equivalents are given for general information only and are based upon 1.00 inch = 25.4 mm. 2. Areas between cooli
32、ng fins, area between anode terminal and grid 2 terminal, and area between heater terminal and heater-cathode terminal shall not be used for any purpose. 3. Maximum dimensions shall be determined by gauge No. 4 (see figure 2.) 4. With cylindrical surfaces of the anode terminal, screen grid terminal,
33、 control grid terminal, heater cathode terminal, and heater terminal clean, smooth, and free of burrs, the tube shall enter the gauge No. 4 (see figure 2). Axes of cylindrical holes H1 and H5 and axis of post P shall be concentric within .001 inch (0.03 mm). Seating shall be determined by failure of
34、 gauge .125 inch (3.18 mm) wide and .010 inch (0.25 mm) thick to enter between heater cathode terminal and bottom surface of hole H4. A slot in the gauge is provided to permit this measurement to be made. 5. Minimum dimension shall be determined by gauge No. 4 (see figure 2). 6. This dimension to be
35、 inspected by inserting gauge .050 inch (1.27 mm) thick minimum between the two fins. 7. Dimension “N“ applies to dimension “E“ only. 8. Dimension “P“ applies to dimension “G“ only. 9 Dimension “Q“ applies to dimension “F“ minus dimension “H“ only. 10. Dimension “R“ applies to dimension “H“ only. 11
36、. In area included between anode terminal and grid 2 terminal, no part of tube shall exceed dimension “P“. 12. On any one tube, this dimension shall never be greater than “N“. 13. On any one tube, this dimension shall never be greater than “P“. 14. The acceptance level for all dimensions listed unde
37、r conformance inspection, part 1, shall be 1.0, in accordance with MIL-PRF-1, table III. 15. Dimensions shall be checked 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 first three tubes wi
38、th an acceptance number of zero, and a second sample of three tubes with a combined acceptance number of one. In the event of failure, the test will be made as a part of conformance inspection, part 2, with an acceptance level of 6.5, in accordance with MIL-PRF-1, table III. The regular “12-calendar
39、 month“ double sampling plan shall be reinstated after three consecutive samples have been accepted. FIGURE 1. Outline drawing of electron tube type 6816 and 6884 - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1239F 8 Hole Lim
40、its Min Max H1 - 1.120 H2 - 1.020 H3 - .765 H4 - .520 H5 - .072 FIGURE 2. Gauge No. 4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1239F 9 Referenced documents. In addition to MIL-PRF-1, this specification sheet references: MIL-STD-1311
41、 289-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 no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned
42、 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 DLA - CC Navy - EC Air Force - 85 (Project 5960-2011-021) DLA - CC Review activities: Army - AR Nav
43、y - 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 https:/assist.daps.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
