1、 MIL-PRF-1/1508C 4 August 2009 _ SUPERSEDING MIL-PRF-1/1508B 18 June 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, RECEIVING TYPE 6754 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: Rectifier, miniature, full wave. Outline: See figure 1. Base: E9-1. Envelope: T6-1/2. Cathode: Coated unipotential. Base connections: Pin No. 1 2 3 4 5 6 7 8 9 Element 2a nc 2k h h nc 1k nc 1a ABSOLUTE RATINGS: Pa
3、rameter: Ef epx Epp/a ib Io i(surge) Rl Cl tk Zp/a Ehk TE Alt Unit: V v V ac ma mA dc a Ohms F sec Ohms v C ft Maximum: 6.6 1,450 1/ 330 1/ 1.10 - - 45 1/ 500 300 1/ Minimum: 6.0 - - - - - - - - - - - - Test conditions: 6.3 - 350 2/ - - - 3,890 4 - - - - - See footnotes at end of table I. _ GENERAL:
4、 First article inspection: Required. 12/ Reliable tube. AMSC N/A FSC 5960 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1508C 2 TABLE I. Testing and inspection. Inspection Method Conditions AcceptanceSymbolLimits Unit MIL-STD-1
5、311 Level /3 Min Max Conformance inspection, part 1 Heater current 1301 0.65 If 0.9 1.1 A Heater-cathode leakage 1336 Ehk = 500 V dc 5/ 0.65 Ihk - 50 A dcOperation of rectifiers (1) 1353 4/ 0.65 Io 95 105 mA dcOperation of rectifiers (2) 1353 Ef = 5.5 V ac 0.65 Io Ef - 7 mA dcEmission 1231 Eb = 15 V
6、 dc 5/ 0.65 Is 65 - mA dcShort and discontinuity detection 1201 0.4 - - - - Conformance inspection, part 2 Insulation of electrodes 1211 Ep-all = -1,500 V dc 5/ 6/ 2.5 - - - - Low-frequency vibration 1031 10 G; F = 40 Hz; no voltages 6.5 - - - - Shock 1041 500 G; Epp/a = 0 - - - - - Vibration fatigu
7、e 1031 No voltages 6.5 - - - - Post-shock and vibration- fatigue test end points - Heater-cathode leakage Operation of rectifiers(1) - - Ihk Io - 85 100 - A dcmA dcBase strain 1121 - - - - - Glass strain 2126 2.5 - - - - Permanence of marking 1105 - - - - - See footnotes at end of table. Provided by
8、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1508C 3 TABLE I. Testing and inspection - Continued. Inspection Method MIL-STD-1311 Conditions Acceptancelevel SymbolLimits Unit /3 Min Max Conformance inspection, part 3 Heater-cycling life 1506 Ef = 7.
9、0 V; Ehk = 350 Vac; Eb = 0; 2.5 minutes on; 2.5 minutes off - - 3,000 - CyclesHeater-cycling life test end point - Heater-cathode leakage - Ihk - 100 A dc Survival-rate life 1521 TA = room 8/ - - - - - Survival-rate life- test end points - Short and discontinuity detection Operation of rectifiers (1
10、) - - - Io - 95 - - - mA dc Life-test (1) provisions - Survival-rate life-test conditions; TE = 300C; 9/ - - - - - Life-test (1) end points (500 hours) - Inoperatives Heater current Operation of rectifiers (1) Change in operation of rectifiers (1) of individual tubes Heater-cathode leakage - - - - -
11、 - If Io Io t Ihk - 0.85 90 - - - 1.15 - 8.0 100 - A mA dc mA dc A dc Life-test (2) provisions - Survival-rate life-test conditions - - - - - Life-test (2) end points (500 hours) - Inoperatives Heater current Operation of rectifiers (1) Change in operation of rectifiers (1) of individual tubes Heate
12、r-cathode leakage - - - - - - If Io Io t Ihk - 0.85 90 - - - 1.15 - 8.0 100 - A mA dc mA dc A dc Life-test (2) end points (1,000 hours) - Inoperatives Heater current Change in operation of rectifiers (1) of individual tubes Heater-cathode leakage - - - - - If Io t Ihk - 0.85 - - - 1.15 10.0 100 - A
13、mA dc A dc See footnotes at top of next page. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1508C 4 TABLE I. Testing and inspection - Continued. 1/ To simplify the application of the maximum ratings to circuit design, absolute maximum rat
14、ings are presented in chart form as rating charts I, II, III, and IV. Operating points should be so selected that the boundary limits on rating charts I, II, III, and IV are not exceeded with a bogey tube under the worst probable operating conditions with respect to supply-voltage variation, equipme
15、nt component variation, equipment control adjustment, and environmental conditions. A brief description of each of the rating charts is given below. The values of ac supply voltage as presented refer to the unloaded supply voltages per anode. a. Rating chart I (see figure 2). This chart presents the
16、 maximum ratings for ac anode supply voltage and dc output current. The boundary FAEDG defines the limits for capacitor-input filter operation and the boundary FABCDG defines the limits for choke-input filter operation. b. Rating chart II (see figure 3). This chart provides a convenient method for c
17、hecking conformance with the maximum steady-state peak-anode-current rating. Rating chart II applies to capacitor-input filter operation only. c. Rating chart III (see figure 4). This chart shows the minimum value of anode-supply resistance (Rs) required to remain within the transient peak-anode-cur
18、rent rating. The value of Rs should be such that it lies to the left of the line on the rating chart at the highest probable value of line voltage. Rating chart III applies to capacitor-input filter operation only. d. Rating chart IV (see figure 5). This chart presents the maximum ratings for ac ano
19、de supply voltage and altitude. Rating chart IV refers to both capacitor-input filter and choke-input filter operation. 2/ All values of Epp/a refer to the unloaded supply voltage. The ratings refer to rectifier operation with sinusoidal supply voltages within the frequency range of 25 to 1,000 Hz.
20、3/ This specification sheet uses accept on zero defect sampling plan in accordance with MIL-PRF-1, table III. 4/ In a full-wave circuit, adjust Zp/a such that a tube having Etd = 15 V dc at 85 mA dc per anode gives Io = 100 mA dc. 5/ Test each section separately. 6/ Heater and cathode tied together
21、and positive with respect to anode. 7/ This test shall be conducted on the initial lot and thereafter on a lot approximately every 6 months. When one lot has passed, the 6-month rule shall apply. In the event of lot failure, the lot shall be rejected and the succeeding lots shall be subjected to thi
22、s test until a lot has passed. Sample size code letter E, shall apply. 8/ In a full-wave life-test circuit, the values specified for Rl and Cl may be considered as approximate and shall be adjusted initially to give not less than Io = 85 mA dc with ib equal to or greater than 330 ma. Ehk = Eo. 9/ En
23、velope temperature (TE) requirements, when measured in accordance with the temperature by conduction-band measurement (method 1226), will be satisfied if a tube having bogey Etd ( 10 percent at Is = 46 mA dc per anode) under normal test conditions, is determined to operate at or above minimum specif
24、ied temperature at any position in the life-test rack. 10/ A 20-tube sample shall be selected from a lot at random in such a manner as to be representative of the lot. If such selection results in a sample containing tubes which are outside the initial specification sheet limits for the relevant lif
25、e-test end-point characteristics, such tubes shall be replaced by randomly selected acceptable tubes. 11/ In the event of failure of the first sample on life-test (2), select a completely fresh sample of 40 tubes which meet the acceptance inspection limits for those characteristics, specified as lif
26、e-test (2) end points. 12/ All tests applicable herein, including conformance inspection parts 1, 2, and 3, shall be performed during first article inspection. The number of units to be tested shall be as specified in the contract or order. Provided by IHSNot for ResaleNo reproduction or networking
27、permitted without license from IHS-,-,-MIL-PRF-1/1508C 5 Dimensions Ltr Inches Millimeters Min Max Min Max Conformance inspection, part 1 A - .875 - 22.23 B - 2.500 - 63.50 C - 2.750 - 69.85 D .250 NOM 6.35 NOM FIGURE 1. Outline drawing of electron tube type 6754. Provided by IHSNot for ResaleNo rep
28、roduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1508C 6 FIGURE 2. Rating chart I absolute maximum ratings. FIGURE 3. Rating chart II absolute maximum ratings.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1508C 7 F
29、IGURE 4. Rating chart III absolute maximum ratings. FIGURE 5. Rating chart IV absolute maximum ratings.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1508C 8 Referenced documents. In addition to MIL-PRF-1, this document references the foll
30、owing: MIL-STD-1311 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 ar
31、e cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custodian: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 11 (Project 5960-2009-026) DLA - CC Review activities: Nav
32、y - AS, CG, OS, SH Air Force - 19 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-,-,-
