1、 MIL-PRF-1/1055F 16 December 2002 SUPERSEDING MIL-PRF-1/1055E 27 August 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, MICROWAVE (NEGATIVE GRID) TYPE 6442 This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The requirements for acquiring the el
2、ectron tube described herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Triode, planar. Dimensions: See figure 1. Mounting position: Any. Weight: 1 ounce nominal. ABSOLUTE RATINGS: Parameter: Ef F1 Eb epy Ec Ehk ib Ib Ic ik Unit: V GHz V dc kv V dc V dc a mA dc mA
3、 dc a Osc or amp 3/ Maximum: Minimum: 5.7 4/ 4.5 2.5 - 350 - - - -50 - 90 - - - 35 - 15 - - - Pulse modulated Osc or amp 5/ Maximum: Minimum: 5.7 4/ 4.5 2.5 - 275 - - - -50 - 90 - - - 35 - 15 - - - Anode pulsed Osc or amp 6/ Maximum: Minimum: 6.3 4/ 5.7 3.5 - - - 3.0 - -100 - 90 - 2.5 7/ - 2.5 - 1.2
4、5 - 3.75 - Class A RF amp Maximum: Minimum: 6.6 5.7 - - 350 - - - -25 - 90 - - - 35 - - - - - Test conditions: 6.3 - 350 - Adj - - 35 - - See footnotes at end of table I. AMSC N/A 1 of 10 FSC 5960 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. INCH-POUND Provided b
5、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1055F 2 ABSOLUTE RATINGS: - Continued. Parameter: ic Pp Pi tp Du tk T(seal) Barometric pressure, reduced Unit: a W W s - sec C 1/ mmHg 2/ Osc or amp 3/ Maximum: Minimum: - - 8.0 - 12 - - - - - - 30 175
6、- 20 - Pulse modulated Osc or amp 5/ Maximum: Minimum: - - 6.0 - 9.5 - - - - - - 30 175 - 20 - Anode pulsed Osc or amp 6/ Maximum: Minimum: 1.25 - 7.5 - 7.5 - 2.0 - 0.001 - - 60 175 - 250 - Class A RF amp Maximum: Minimum: - - 8.0 - 12 - - - - - - 0 175 - 20 - Test conditions: - - - - - 120 min - 10
7、/ - See footnotes at end of table I. _ GENERAL: Qualification: Required. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1055F 3 TABLE I. Testing and inspection. Limits Inspection Method Notes Conditions Acceptance Level 20/ Symbol Min Max
8、Unit Conformance inspection, part 1 Pulsed oscillation Insulation of electrodes Emission Pulsing emission Electrode voltage (1) grid Total grid current - 1211 1231 1231 1261 1266 12/ 14/ 15/ 16/ - - - - F = 3.45 GHz (min); epy = 3,000 v; Rg/lb = 2.5 mA dc; tpv = 1.0 s 10% trv = 0.1 s (max); tfv = 0.
9、2 s (max); prr/Du = 0.001 5%; Ef = 6.0 V Ef = 6.3 V Eb = Ec/ls = 40 mA dc Prr = 500 (max); tp = 1 to 3 s; Du = 0.0005 (min); eb = ec = etd/is = 8a 0.65 0.65 0.65 0.65 0.65 0.65 Po Rgp Rgk Eb = Ec etd Ec lc 1.75 250 25 - - -2.5 - - - - 4.0 175 -5.75 -0.5 W (useful) Meg Meg V dc v V dc A dc Conformanc
10、e inspection, part 2 Electrode voltage (2) (grid) Heater current Transconductance Resonance test Amplification factor Direct-interelectrode capacitance Heater-cathode leakage 1261 1301 1306 - 1316 1331 1336 - - - 8/ 13/ - - - Ec/lb = 2 mA dc No voltages No voltages; use shielded socket in accordance
11、 with Drawing 260-JAN. 21/ Eb = Ec = 0 Ec lf Sm - Mu Cgp Cgk Cpk lhk -5.0 840 13,500 - 35 2.10 4.60 - - -11.5 960 19,000 - 65 2.45 5.45 0.045 100 V dc mA mhos - - pF pF pF A dc See footnotes at end of table. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
12、S-,-,-MIL-PRF-1/1055F 4 TABLE I. Testing and inspection - Continued. Limits Inspection Method Notes Conditions Symbol Min Max Unit Conformance inspection, part 3 Life test Life-test end point: Pulsed oscillation Periodic-check tests Barometric pressure reduced (1) Barometric pressure reduced (2) Hig
13、h-frequency vibration Shock Shock-test end points: Total grid current Torque Torque-test end points: Total grid current Heater current - - - 1002 1002 1031 1041 - 1266 - - 1266 1301 - - 11/ 18/ 11/ 18/ 17/ 11/ 9/ 17/ Group C; t = 500 hours; pulsed oscillation Pressure = 250 mmHg (max); voltage = 2,0
14、00 V ac; TA = 30C 10C Pressure = 20 mmHg (max); voltage = 500 V ac; TA = 30C 10C Ebb = 300 V dc; Ec/lb = 10 mA dc; Rp = 10,000 ohms; use socket in accordance with Drawing No. 261-JAN 21/ No voltages; Accel = 400 G peak (min); 0.5 ms duration (min); use socket in accor-dance with Drawing No. 261-JAN
15、21/ No voltages - Po - - Ep - lc - lc lf - - - - - - - - - 840 - 25 - - 100 - -0.6 - -0.6 960 - % - - mV dc - A dc - A dc mA See footnotes at top of next page. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1055F 5 TABLE I. Testing and ins
16、pection - Continued. 1/ Sufficient conduction and convection cooling shall be provided to limit the envelope temperature to the specified maximum of 175C under all operating conditions. 2/ Operation at this altitude is possible in a suitably designed circuit. 3/ Modulation essentially negative may b
17、e used if the positive peak of the audio frequency envelope does not exceed 115 percent of the carrier conditions. 4/ This tube operates at frequencies where transit-time effects of the electron current shall be considered. The principal effects influencing the tube operation are the decrease in pow
18、er output and operating efficiency with increase in frequency, and the bombardment and heating of the cathode by electrons from the region of the grid, which can be sufficiently severe to result in short tube life and erratic operation. Operating frequency, circuit design and adjustment, grid bias,
19、grid current, average power input and the operating voltage contribute to some degree to the magnitude of the resulting cathode bombardment. There is a heater voltage which will maintain the cathode at the correct operating temperature for a set of operating conditions. If the conditions of operatio
20、n result in appreciable cathode back-heating. It may be necessary to initiate dynamic operation of the tube at normal heater voltage, followed by a reduction of heater voltage to the proper value. A maximum variation of 5 percent in heater voltage is recommended where consistent operation and extend
21、ed tube life is a factor. 5/ Carrier conditions for use with a maximum modulation factor of 1.0. 6/ Tube shall not be operated for more than 6 microseconds in any 5,000 microsecond interval. Tube shall not be grid-pulsed beyond the CW ratings. 7/ The regulation or series-anode-supply impedance, or b
22、oth, shall limit the instantaneous peak current, with the tube considered as a short circuit, to a maximum of 10 times the specified maximum current rating. 8/ Other tube contact configurations may be used provided the tube contact area remains unchanged and the socket, jig, or cavity gives equal pe
23、rformance. Mounting of the socket, jig, or cavity may be at the option of the manufacturer. 9/ Torque test shall be performed as follows: a. A torque of 15 inch-pounds shall be applied between the anode and heater terminal No. 1 without shock. This is not a destructive test. b. A torque of 5 inch-po
24、unds shall be applied between heater terminal No. 1 and heater terminal No. 2 without shock. This is not a destructive test. 10/ During the test, the maximum temperature of any part of the envelope shall be limited to 175C maximum by conduction or forced convection cooling. 11/ Perform test on 10 tu
25、bes selected at random from the first production lot of each calendar year. If one tube fails, the test shall become part of conformance inspection, part 2. Acceptance shall be based upon accept on zero defect (c = 0) sampling plan, in accordance with table III of MIL-PRF-1. After three consecutive
26、successful submissions, the test shall revert to an annual 10-tube test. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1055F 6 TABLE I. Testing and inspection - Continued. 12/ All tests listed under conformance inspection, part 1, are to
27、be performed at the conclusion of the holding period. 13/ Grid anode resonance: Test in cavity in accordance with DSCC Drawing No. D64102. Cavity shall resonate at 1.74 GHz 2.5 MHz with tuning slug in accordance with DSCC Drawing No. B64103 at TA = 25C 5C. Grid-cathode resonance. Test in cavity in a
28、ccordance with DSCC Drawing No. D64102. Cavity shall resonate at 1.793 GHz 2.5 MHz with tuning slug in accordance with DSCC Drawing No. B64103 at TA = 25C 5C. When plotted on graphs of resonant frequency versus grid-anode capacitance and resonant frequency versus grid-cathode capacitance, the tube u
29、nder test (TUT) shall be represented by a point within a parallelogram whose four corners are located by the following points: Point Capacitance (pF) Frequency (GHz) 1 2 3 4 C-gp 2.10 2.10 2.45 2.45 C-gk 4.60 4.60 5.45 5.45 F-gp 1.928 1.947 1.895 1.914 F-gk 1.890 1.914 1.851 1.875 14/ Test in cavity
30、 in accordance with Drawing No. 253-JAN 21/. Measure useful power output with the coupling and tuning adjusted for maximum power output. The tube shall operate under the given conditions and after the required circuit adjustments for a minimum of 10 seconds without arcing or instabilty, as evidenced
31、 by pronounced variations in the average anode current meter or the power output meter. If temporary arcing does occur during the 10-second period, the tube shall subsequently operate for 60 seconds without arcing. The test may be discontinued at the end of the 10-second period if the power output h
32、as not completely stabilized but is rising. If the power output is falling, the test will be continued until a stable reading is obtained. For qualification purposes, a stabilized reading shall be obtained. All readings shall be “nonsquegging“ power. 15/ The pulse characteristics are defined as foll
33、ows: a. epy is the smooth peak voltage excluding spike (see method 1296). b. The interval of trv and tfv is between 20 and 85 percent of the smooth peak value of the voltage pulse. c. The definition of tp is applicable to tpv. d. The parameter tpv, tfv, and trv may be measured with the tube replaced
34、 by a 1,000-ohm noninductive resistor. The load VSWR shall be 1.5 maximum. 16/ The insulation between the grid and the cathode shall be measured with a voltage of 100 V dc. The other insulation test shall be made in accordance with method 1211. Provided by IHSNot for ResaleNo reproduction or network
35、ing permitted without license from IHS-,-,-MIL-PRF-1/1055F 7 TABLE I. Testing and inspection - Continued. 17/ This test shall be performed during the initial production and once each succeeding 12-calendar months in which there is production. A sampling plan shall be used, with a sample of six tubes
36、 having an acceptance number of zero defects. In the event of failure, the test will be made as part of conformance inspection, part 2. Acceptance shall be based upon accept on zero defects (c = 0) sampling plan, in accordance with table III of MIL-PRF-1. The regular “12-calendar month“ sampling pla
37、n shall be reinstated after three consecutive samples have been accepted. 18/ The specified voltage shall be applied between anode and grid. No other voltages shall be applied. The TUT shall be excited under specified conditions at atmospheric pressure for 10 seconds minimum. There shall be no evide
38、nce of arc-over or instability as evidenced by significant variations observed in the waveform of the applied voltage. Should arcing occur during the 10-second period, the TUT shall subsequently operate for 60 seconds minimum without arcing. The pressure shall then be reduced to specified conditions
39、 and the TUT must operate for another 60 seconds minimum without visible arc-over. 19/ Revision letters are not used in this revision to identify changes with respect to the previous issue, due to the extensiveness of the changes. 20/ Acceptance shall be based upon accept on zero defect (c = 0) samp
40、ling plan, in accordance with table III of MIL-PRF-1. 21/ Direct questions about the availability of JAN drawings to the preparing activity: DSCC-VAT, Defense Supply Center Columbus, P.O. Box 3990, Columbus, OH 43216-5000. Provided by IHSNot for ResaleNo reproduction or networking permitted without
41、license from IHS-,-,-MIL-PRF-1/1055F 8 FIGURE 1. Outline drawing of electron tube type 6442. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1055F 9 FIGURE 1. Outline drawing of electron tube type 6442 - Continued. Dimensions Inches Millime
42、ters Ltr Min Max Min Max Notes Conformance inspection, part 2 A - .250 - 6.35 B .810 .818 20.57 20.77 C 1.219 1.281 30.96 32.53 D .953 .984 24.21 24.99 E .750 .813 19.05 20.65 F .070 .078 1.78 1.98 4, 5 G - 1.016 - 25.80 J .539 .549 13.69 13.94 6 K .318 .328 8.08 8.33 L .180 .190 4.57 4.82 M .365 .3
43、71 9.27 9.42 AE .429 - 10.90 - 4 Conformance inspection, part 3 (periodic check) 3 N - .453 - 11.50 P .560 .570 14.22 14.47 O - .609 - 15.46 R .077 .097 1.96 2.46 S - .266 - 6.75 T .015 .090 0.38 2.28 W - .285 - 7.24 1 X - .375 - 9.52 7 Z .490 .520 12.45 13.20 Reference dimensions U .094 2.39 4, 5 V
44、 .094 2.39 4, 5 Y .016 R 0.41 R AA .750 19.50 2 AB .547 13.89 2 AC 1.000 25.40 2 AD 1.109 28.17 2 AF .453 11.51 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1055F 10 NOTES: 1. Exhaust tubulation shall not be subjected to any mechanical
45、 stress. 2. Eccentricity shall be gauged at points designated and what shall be as follows (note 3 shall apply): Eccentricity Contact Inches Millimeters Reference Anode Cathode Anode-cathode Heater No. 1 Heater No. 2 Heater No. 1 and 2 .010 max .010 max .020 TIR .015 max .015 max .030 TIR .25 .25 .5
46、1 .38 .38 .76 Grid contact Grid contact Grid contact Grid contact Grid contact Grid contact 3. These dimensions shall be tested on 10 tubes per month when in continuous production. Failure of more than one tube to meet tolerances for any dimension shall cause that dimension to become, for all lots i
47、n process, part of conformation inspection, part 2. 4. Contact surface shall be confined to this area. 5. Only these surfaces shall be used for tube stops or clamping. 6. Maximum diameter shall not be increased by solder. 7. Tube marking shall be confined to this area. FIGURE 1. Outline drawing of electron tube type 6442 - Continued. Custodians: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 11 (Project 5960-3617) DLA - CC Review activities: Navy - AS, CG, MC, OS Ai
