1、 MIL-PRF-1/1405E 27 July 2009 _ SUPERSEDING MIL-PRF-1/1405D 18 June 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, TRAVELING WAVE TYPE 7640 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube descr
2、ibed herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Forward-wave amplifier, frequency range 2.9 to 3.1 GHz, power output 1 kW, periodic permanent magnet focus, air cooled, coaxial rf connectors. ABSOLUTE RATINGS: 2/ Parameter: Ef If (surge) ek ik ia + iw VSWR U
3、nit: V A v a ma - Maximum: 8.5 10 -8,000 2.0 1,000 2.0:1.0 Minimum: 6.0 - - - - - ABSOLUTE RATINGS: 2/ Parameter: Pp Du tp Pi(rf) tk TE Unit: W - s 3/ W 9/ sec C 4/ Maximum: 100 0.006 6.0 2 - 150 Minimum: - - - - 120 - PHYSICAL CHARACTERISTICS: Dimensions: Mounting position: Cooling: RF connectors:
4、See figure 1. Any. 2 cfm minimum air through base. See figure 1. DC connectors: Focusing circuit: Weight: Marking: See figure 1. PPM, integral. 17.5 pounds, maximum. See 6/ and 7/ TEST CONDITIONS: Parameter: Ef Du ek tp Pi (rf) F Frequency Unit: V - v s W GHz F GHz Test condition 1: 6.3 0.0055 Adj 5
5、.5 0.001 F1, F2, F3 1 2.9 2% Test condition 2: 6.3 0.0055 Adj 5.5 1.0 F1, F2, F3 2 3.0 2% Test condition 3: 6.3 0.0055 Adj 5.5 1.0 F2 3 3.1 2% See footnotes at end of table I. _ GENERAL: Qualification: Not required. Burn-in: 25 hours 17/ Service-life guarantee: 16/ AMSC N/A FSC 5960 INCH-POUND Provi
6、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1405E 2 TABLE I. Testing and inspection. Inspection Method Notes Test Conditions Symbol Limits Unit MIL-STD-1311 Min Max Conformance inspection, part 1 Heater current 1301 5/ - - - If - 4.5 A Catho
7、de current 1256 - 2 Pi(rf) = 0 ik 0.75 1.75 a Cathode warmup time 4303 - 2 tk1 = 250 sec; tk2 = 300 sec; Pi(rf) = 0 ik - 0.1 a Cathode voltage 1261 - 1 ek -6.0 -7.0 kv Cathode voltage 1261 - 2 ek -6.5 -7.5 kv Small-signal gain (1) 4253 1/ 9/ 1 = 1.5 (max) Gss 33 43 dB Small-signal gain (2) 4253 1/ 9
8、/ 1 = 1.5 (max) Gss 30 - dB Small-signal gain variation 4253 1/ 9/ 10/1 = 1.5 (max) Gss - 3.0 dB Large-signal gain (1) 4253 1/ 9/ 2 = 1.5 (max) GIs 30 40 dB Large-signal gain (2) 4253 1/ 9/ 2 = 1.5 (max) GIs 27 - dB Large-signal gain variation (1) 4253 1/ 9/ 2 = 1.5 (max) GIs - 2.0 dB Large-signal g
9、ain variation (2) 4253 1/ 9/ 14/3 = 1.5 (max) GIs - 2.5 dB Power output variation 4251 8/ 9/ 12/2 = 1.5 (max) F = F1; ek (1) = 1.02 ek; Pi(rf) (1) = 0.5 W; Pi(rf) (2) = 1.5 W; F = F3; ek(2) = 0.98 ek po - 1.0 dB Spurious power output (1) 4261 13/ 1 Pi(rf) = 0 spo - -10 dBm Spurious power output (2)
10、4261 13/ 2 Pi(rf) = 0 spo - -10 dBm Conformance inspection, part 2 Spectrum - 9/ 15/ 1 F = F2 F - 30 MHz Large-signal gain variation (3) 4253 9/ 11/ 3 tk3 = 5 minutes; tk4 = 20 minutes GIs - 1.5 dB See footnotes at top of next page. Provided by IHSNot for ResaleNo reproduction or networking permitte
11、d without license from IHS-,-,-MIL-PRF-1/1405E 3 TABLE I. Testing and inspection - Continued. 1/ A swept frequency from F1 through F3 may be used for this test. 2/ Cathode and one leg of heater shall be connected internally. Anode, helix, and collector shall be at ground potential. All voltages are
12、referred to ground except heater potential, which is referred to cathode. 3/ The pulse shall comply with the requirements stated in method 4304, pulse characteristics, except that the rise and decay times shall not exceed 0.5 s and 0.6 s respectively. The peak-to-peak ripple shall not exceed 100 vol
13、ts. 4/ TE is the temperature at the midpoint of the cylindrical surface of the bulb with the specified flow of cooling air. 5/ Unless otherwise specified, the acceptance level for all tests listed under conformance inspection, part 1, shall be 1.0, inspection level II. 6/ Each tube shall be marked w
14、ith the following information: a. Manufacturers identification. b. JAN 7640. c. Serial number. d. Acceptance date. e. Cathode voltage for optimum small-signal gain. f. Cathode voltage for optimum large-signal gain. g. RF input and output connectors. 7/ One reproducible and two prints of data sheets
15、for all tests performed under this specification shall be supplied to the contractor. One copy of the data sheet shall be packed with the tube. 8/ The rf output pulse shall evidence no more than 10 percent amplitude distortion from any source other than the applied dc pulse. 9/ The input power, Pi(r
16、f), is defined as incident power from a 50-ohm source at the rf input connector of the tube. 10/ Gss and GIs(1) shall be the difference between maximum gain and minimum gain within the frequency range. 11/ GIs(2) shall be the difference in GIs at tk3 and tk4. 12/ po shall be the difference in power
17、output for Pi(rf) (1) and Pi(rf) (2). 13/ The input shall be terminated into a 50-ohm matched load. The output termination shall be a 3-dB attenuator in series with a variable-phase short circuit. The bandpass filter shall have a bandpass from 2.1 to 3.9 GHz. 14/ A variation of 5 percent in ek from
18、the test condition 2 value shall result in a gain variation, GIs, from the measured value, GIs, of not greater than the value specified. 15/ Spectrum width shall be measured with a receiver having an IF bandwidth of 3.0 MHz, or less. In the frequency range 2.8 to 3.2 GHz, the range shall be the resp
19、ective lowest and highest frequencies at which the signal power is at least 30 dB below the power of the center frequency. 16/ Service-life guarantee of 1,000 hours is applicable when specified in the contract. 17/ After completion of this test, all tubes shall meet the parameters listed on the data
20、 sheet (see 7/). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1405E 4 NOTE: Pins 5 and 6 are connected internally. FIGURE 1. Outline drawing of electron tube type 7640. Dimensions Ltr Inches Millimeters Min Max Min Max A 4.5625 4.6875 11
21、5.69 119.06 B 3.9687 4.0313 100.80 102.40 C .0937 .1563 2.38 3.97 D .375 .500 9.53 12.70 E - 16.625 - 422.28 F 10.4687 10.5313 265.90 267.50 G 2.657 2.719 67.49 69.06 H .7187 .7813 18.25 19.85 J 11.4687 11.5313 291.30 292.90 K .7187 .7813 18.25 19.85 L 3.5679 3.6405 90.62 92.47 M 30 NOM 30 NOM N .71
22、87 .7813 18.25 19.85 P .5937 .6563 15.08 16.67 Q 4.9687 5.0313 126.20 127.80 R 3.437 3.499 87.30 88.87 S 3.219 3.281 81.76 83.34 T .9314 .9436 23.66 23.97 U 1.814 1.936 46.08 49.17 V .5937 .6563 15.08 16.67 W .059 .069 1.50 1.75 X 1.788 1.820 45.42 46.23 Y Input UG -19 B/U connector Z Output UG-19B/
23、U connector Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1405E 5 Referenced documents. In addition to MIL-PRF-1, this document references the following: MIL-STD-1311 Marginal notations are not used in this revision to identify changes wi
24、th respect to the previous issue due to the extent of the changes. Custodian: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 85 (Project 5960-2009-020) DLA - CC Review activities: Army - AR Navy - AS, CG, MC, OS, SH Air Force - 99 DLA GS NOTE: The activities listed above were intereste
25、d 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-,-,-
